# ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 1 MARKS

Size: px
Start display at page:

Transcription

1 ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 1 MARKS 1. Name any two basic properties of electric charge. [1] 2. Define the term electric dipole-moment. [1] 3. Write the physical quantity, which has its unit coulomb/volt. Is it a vector or a scalar quantity? [1] 4. Is electrostatic potential necessarily zero at point where electric field strength is zero. Illustrate your answer. [1] 5. In a parallel plate capacitor the potential difference of 102 V is maintained between the plates. What will be the electric field at points A and B? [1] 6. Define electric potential. Is it a vector or a scalar quantity? [1] 7. Force between two point electric charges kept at a distance d apart in air is F. If these charges are kept at the same distance in water, how does the force between them changes? [1] 8. Sketch the electric lines of force for two positive Q 1 and Q 2 (Q 1 >Q 2 ) separated by a distance d. [1] 9. Name the physical quantity whose SI unit is (i) coulomb/ volt (ii) newton/coulomb (iii) joule/coulomb. [1] 10.Two protons A and B are placed between two parallel plates having a potential difference V as shown in the figure. [1] will these protons experience equal or unequal force? 11. What is the amount of work done in moving a 100 nc charge between two points 5 cm apart on an equipotential surface? [1] 12. In e medium the force of attraction between two point electric charges, distance d apart is F. What distance apart should these be kept in the same medium so that the force between them becomes (i) 3F (ii) F/3? [1] 13. A uniform electric field E exists between two charged plates as shown in the figure. What would be the work done in moving a charge q along the closed rectangular path ABCDA? [1] 14. What would be the work done if a point charge +q, is taken from a point A to the point B on the circumstance of a circle drawn with another point charge +q at the centre? [1] e-edge Education Classes 1 of 7

2 15. If a point charge +q, is taken first from A to C and then form C to B of a circle drawn with another point-charge +q as centre, then along which path more work will be done? [1] 16. Why does the electric field inside a dielectric decrease when it is placed in an external field? [1] 17.In parallel plate capacitor, the capacitance increases from 4µF to 80µF, on introducing dielectric medium between the plates. What is the dielectric constant of the medium? [1] 18. Find the electric field between two metal plates 3 mm apart, connected to a 12 V battery? [1] 19. The work done in moving a charge of 3 mm apart, connected to a 12 V battery. [1] 20. Two charges, +5µC & 80µC are placed 1 mm part. Calculate the dipole moment. [1] 21. Consider three charged bodies A, B and C. IF A and B repel each and A attracts C. What is the nature of the force between B and C? [1] 22. What is the important of Coulomb s Law of electric force? [1] 23. Define one coulomb? [1] 24. Two point charges q 1 and q 2 are such that q 1 q 2 < 0 what is the nature of force between charges? [1] 25. Vehicles carrying inflammable material usually have metallic ropes touching the ground during motion, Why? [1] 26. A coulomb run through one s dry hair attracts small bits of paper. Why? What happens, if the hair is wet? [1] e-edge Education Classes 2 of 7

3 ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 2 & 3 MARKS 27. Calculate the capacitance of the capacitor C in the figure; if the equivalent capacitance of the combination between A and B is 15µF. [2] 28.How much energy will be stored in a capacitor of 470 µf capacity, when charged by a battery 20V? [2] 29.Three capacitors of equal capacitance, when connected in se2ries, have a net capacitance of C 1 and when connected in parallel have a capacitance of C 2, What will will be the value of C 1 /C 2? [2] 30. An electric dipole, when held at 30 o with respect to a uniform electric field of 10 4 N/C, experiences a torque of 9 x Nm. Calculate the dipole moment of the dipole. [2] 31. The electric field at a point due to a point charge is 20 N/C and electric potential at that point is 10J/C. Calculate the distance of the point from the charge and the magnitude of the charge. [2] 32. Two point charges +4 µf and -6 µf are separated by a distance of 20cm in air. At what point on the line joining the two charge is the electric potential zero? [2] 33. Two point electric charges of values q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in such a way that the net force acting on q and 2q is zero. Calculate the position of charge Q in terms of q and d. [2] 34. A proton placed in a uniform electric field of magnitude 2000 N/C moves between two points in the direction of electric field. If the distance between the points is 0.2 m, find the value of (i) p.d. between the points, (ii) work done. [2] 35. Four capacitors are connected as shown in the figure given below: Calculate the equivalent capacitance between the points X and Y. [2] 36. An electric dipole of length 2cm is placed with its axis making an angle of 60o to a uniform electric field of 105 N/C. If it experience a torque of 8 3 Nm, calculate the: (i) magnitude of the charge on the dipole, and (ii) Potential energy of the dipole. [2] 37. When two capacitors of capacitance C1 and C2 are connected in series the net capacitance is 3µF ; when connected in parallel its value is 16µF.Calculate value of C 1 and C 2. [2] 38. Two point charges A and B of value +5 µf and +6 µf are kept 12cm apart in air. Calculate the work done when charge B is moved by 2 cm towards charge A. [2] e-edge Education Classes 3 of 7

4 39. A hollow charges 4 µc, -2 µc are separated by a distance of 1 m in air. At what point on the line joining the charges is the electric potential zero? [2] 40. Two point charges of +3 x C and +12 x C are separated by a distance of 2.5 m. Find the3 point on the line joining them at which the electric field intensity is zero. [2] 41. Two point charges of +3 x 10-8 C and -2 x 10-8 C are located 15cm apart in air. Find at what point on the line joining these electric potential is zero. Take potential at infinity to be zero. [2] 42.S 1 and S 2 are two hollow concentric spheres enclosing charges Q and 2Q respectively as shown in the figure (i) What is the ratio of the electric flux through S 1 and S 2? (ii) How will the electric flux through the sphere S 1 change, if a medium of dielectric constant 5 is introduced in the space inside S 1 in place of air? [2] 43.Fore electric field intensity and potential at a point due to a point charge are 36 N/C and 18 J/C square of side 2 2. Calculate the electric potential at the centre of the square. [2] 44.A portion is moved in a uniform electric field of 1.7 x 10-4 N/C between two points A and B separated by s distance of 0.1m. (i) What is the potential difference between the points? (ii) How much work is done in the above process? [2] 45.Two identical metallic spheres, having unequal, opposite charges are placed at a distance 0.90 m apart in air. After bringing them in contact with each other, they are again placed at the same distance apart Now the force of repulsion between them is 0.025N. Calculate the final charge on each of them. [2] 46.In the arrangement of capacitors shown here, the energy stored in the 6µF [3] Capacitor is E. Find the following: (a) Energy stored in the 12µF capacitor (b) Energy stored in the 3µF capacitor (c) Total energy drawn from the battery. 47. Calculate capacitance of capacitor as shown. [3] 48. Calculate the capacitance of the capacitor shown in the figure: where k 1,k 2 and k 3 are the values of dielectric constants. [3] e-edge Education Classes 4 of 7

5 49..Calculate effective capacitance between the terminals A and B. Value of the capacitors are given as [3] C 1 =10µF,C 2 =20µF,C 3 =3µF,C 4 =6µF. the potential difference and charge across each capacitor. 50. A 20µF capacitor charge to 500 volts is connected in parallel with another capacitors of 10 µf charged to 200 volts. Find the common potential? [3] 51. For the network of capacitance shown, find the value of capacitance C if the equivalent capacitance between A and B is 1µf. [3] 52. Define the term electric dipole moment. Derive an expression for total work done in rotating the dipole through an angle θ in uniform electric field E. [3] e-edge Education Classes 5 of 7

6 ELECTROSTATIC CBSE BOARD S IMPORTANT QUESTIONS OF 5 MARKS 53. A parallel plate capacitor of capacitance c is charged to a potential difference v [5] now the battery is disconnected and a dielectric slab of constant K that completely fills the space between two plates is introduced. What will be the new (i) Capacitance (ii) Chare stored (iii) Potential difference between plates (iv) Electric field between 54. What is a dielectric? A dielectric slab of thickness t, is kept between the plates of a parallel plate capacitor separated by distance d. Derive the expression for the capacity of the capacitor for t<<d. [5] 55. A parallel plate capacitor has two identical plates each of area A,separated by a distance d. The space between the plates is filled with a dielectric medium. Derive an expression for the capacitance of the capacitor. [5]. 56.A capacitor is charged to potential V 1.The power supply is then disconnected and the capacitor is then connected in parallel to another capacitor (uncharged) (a) derive the expression for the common potential of the combination of capacitor. (b) Show that the total energy of combination is less than the sum of the energy stored in them before they are connected. [5] 57.Explain the principle of a capacitor. Derive an expression for the for the capacitance of a parallel plate capacitor. [5] 58.What is an electric dipole?deduce an expression for the torque on an electric dipole placed in a uniform electric field. Hence define dipole moment. [5] 59.Define capacitance of a capacitor. Give its S.I unit. Prove that the total electrostatic energy stored in a parallel plate capacitor is ½ CV 2.Hence derive the expression for the energy density of a capacitor. [5] 60.Explain the effect of introducing a dielectric slab between the plates of a parallel plate capacitor on its capacitance. Derive an expression for its capacitance with dielectric as the medium between the plates. [5] 61.Give the principle and explain the working of a Van de Graff generator with the help of a labeled diagram. [5] 62.An electric dipole is held in a uniform electric field. (i) Show that no translators force acts on it. (ii) Derive an expression for the torque acting on it. (iii) The dipole is aligned parallel to the field. Calculate the work done in rotating it through 180. [5] 63.Deriver an expression for the energy stored in a parallel plate capacitor with air as the medium between its plates. Air is replaced by a dielectric medium of dielectric constant k. How does it change the total energy of the capacitor? [5] 64.Derive the expression for the capacitance of a dielectric constant k. Explain why the capacitance decreases when the dielectric medium is removed from between the [5] plates. [5] 65.State Gauss theorem in electrostatics and express it mathematically. Using it, derive an expression for electric field at a point near a thin infinite plane sheet of electric charge. How does this electric field change for a uniformly thick sheet of charge?[5] 66.Define capacitance of a capacitor. Give its unit. Derive an expression for the e-edge Education Classes 6 of 7

7 capacitance of a parallel plate capacitor in which a dielectric of medium of dielectric constant k fills the space between the plates. [5] 67.State Gauss theorem. Give its mathematical expression for the electric field intensity at any point due to an infinite plane sheet of charge density σ C/m Derive an expression for the magnitude of electric field intensity at any point along the equatorial line of a short electric dipole. Give the direction of electric field intensities at two equidistant points from the centre of dipole. One along the axial line and another on the equatorial line? [5] 68.Derive the expression for energy stored in a parallel plate capacitor. How will expression for energy in the capacitor change, when the separation between the plates is doubled and a dielectric medium of dielectric constant 4 is introduced between the plates? capacitor?(assume the capacitor is disconnected from the d.c. source ) [5] Derive the relation V = E 0 A/d for the capacitance of a parallel plate capacitor,where symbols have their usual meanings. A parallel plate capacitor is charged to a potential difference V and disconnected from the supply. If the distance between the plates is doubled, explain how does (i)n electric field and (ii) energy stored in the capacitor change? 0R Define the term electric dipole moment. Give its unit. Derive an expression for the torque acting on an electric dipole held in a uniform electric field. An electric dipole is placed in a uniform electric field and it is free to move. Explain what will happen when it is placed (i) parallel to the field and (ii) perpendicular to the field. 69.Derive an expression for the electric potential at a point along the axial line of an [5] electric dipole. At a point due to a point charge, the values of electric fields intensity and potential are 32 N/C and 16 J/C respectively. Calculate (i) magnitude of the charge and (ii) distance of the charge from the point of observation. Derive an expression for the energy stored in a parallel plate capacitor. A parallel plate capacitor with air as dielectric is charged by a d.c. source to a potential V.Without disconnecting the capacitor from the source, air is replaced by another dielectric medium of dielectric constant 10. State with reason, how does (i) electric field between the plates and (ii) energy stored in the capacitor change. e-edge Education Classes 7 of 7

### 2014 F 2014 AI. 1. Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason.

2014 F 1. Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason. 2. Figure shows the field lines on a positive charge. Is the work done

### 7. A capacitor has been charged by a D C source. What are the magnitude of conduction and displacement current, when it is fully charged?

1. In which Orientation, a dipole placed in uniform electric field is in (a) stable (b) unstable equilibrium. 2. Two point charges having equal charges separated by 1 m in distance experience a force of

### PHYSICS. Electrostatics

Electrostatics Coulomb s Law: SYNOPSIS SI unit of electric intensity is NC -1 Dimensions The electric intensity due to isolated point charge, Electric dipole moment, P = q (2a), SI unit is C m Torque on

### INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS

Roll Number SET NO. General Instructions: INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS CLASS: XII Sub. Code: 04 Time Allotted: Hrs 0.04.08 Max. Marks: 70. All questions are compulsory. There are

### CLASS XII ELECTROSTATICS

PHYSICAL EDUCATION CLASS XII To do practice of specific game & develop skill. Answer the following questions:- UNIT- I a) Write type of tournament & explain. b) Draw know fixtures for number of teams-

### Roll Number SET NO. 42/1

Roll Number SET NO. 4/1 INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS CLASS: XII Sub. Code: 04 Time Allotted: Hrs 0.04.018 Max. Marks: 70 General Instructions: 1. All questions are compulsory. There

### PHYSICS ASSIGNMENT ES/CE/MAG. Class XII

PHYSICS ASSIGNMENT ES/CE/MAG Class XII MM : 70 1. What is dielectric strength of a medium? Give its value for vacuum. 1 2. What is the physical importance of the line integral of an electrostatic field?

### Gurgaon TOPIC: ELECTROSTATIC Assignment 1 (2018)

LJPS Class XII Gurgaon TOPIC: ELECTROSTATIC Assignment (08). A uniform electric field E exists between two charged plates as shown in figure. What would be the work done in moving a charge q along the

CLASS XII Write Short Note: Q.1: Q.2: Q.3: SELAQUI INTERNATIONAL SCHOOL, DEHRADUN ELECTROSTATICS SUBJECT: PHYSICS (a) A truck carrying explosive has a metal chain touching the ground. Why? (b) Electric

### 1)Tw o charges g 4q q and q q are placed

Electrostatics 1)Two charges 4q and q are placed a distance r apart. A charge Q is placed exactly mid way between them. What will be the value of Q so that charge 4q experiences no net force? q/4 q/4 q4

### A) 1, 2, 3, 4 B) 4, 3, 2, 1 C) 2, 3, 1, 4 D) 2, 4, 1, 3 E) 3, 2, 4, 1. Page 2

1. Two parallel-plate capacitors with different plate separation but the same capacitance are connected in series to a battery. Both capacitors are filled with air. The quantity that is NOT the same for

### Physics (

Exercises Question 2: Two charges 5 0 8 C and 3 0 8 C are located 6 cm apart At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero

### Física Básica Experimental I Cuestiones Tema VII. Electrostática. Soluciones incluidas. 1.

1. A cubical surface with no charge enclosed and with sides 2.0 m long is oriented with right and left faces perpendicular to a uniform electric field E of (1.6 10 5 N/C) î. The net electric flux E through

### Electric Potential Energy Chapter 16

Electric Potential Energy Chapter 16 Electric Energy and Capacitance Sections: 1, 2, 4, 6, 7, 8, 9 The electrostatic force is a conservative force It is possible to define an electrical potential energy

### 13 - ELECTROSTATICS Page 1 ( Answers at the end of all questions )

3 - ELECTROSTATICS Page ) Two point charges 8 and - are located at x = 0 and x = L respectively. The location of a point on the x axis at which the net electric field due to these two point charges is

### Ch. 16 and 17 Review Problems

Ch. 16 and 17 Review Problems NAME 1) Is it possible for two negative charges to attract each other? A) Yes, they always attract. B) Yes, they will attract if they are close enough. C) Yes, they will attract

### 1. ELECTRIC CHARGES AND FIELDS

1. ELECTRIC CHARGES AND FIELDS 1. What are point charges? One mark questions with answers A: Charges whose sizes are very small compared to the distance between them are called point charges 2. The net

1. ELECTROSTATICS GIST Electrostatics is the study of charges at rest. The intrinsic property of fundamental particle of matter which give rise to electric force between objects is called charge. Charging

LEVEL 1 1. How many electrons will have a total charge of 1 coulomb? 2. Find the electric field intensity due to a charge of 5 10-8 C at a point 50 cm from it in vacuum 3. An electric charge of 2 c experience

### INDIAN SCHOOL MUSCAT Department of Physics Class : XII Physics Worksheet - 1 ( ) Electric Charges and Fields

INDIAN SCHOOL MUSCAT Department of Physics Class : XII Physics Worksheet - 1 (2017-2018) Electric Charges and Fields Section A Conceptual and application type Questions 1 What happens to the electric field

### Physics (

Question 2.12: A charge of 8 mc is located at the origin. Calculate the work done in taking a small charge of 2 10 9 C from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm).

### AP Physics Study Guide Chapter 17 Electric Potential and Energy Name. Circle the vector quantities below and underline the scalar quantities below

AP Physics Study Guide Chapter 17 Electric Potential and Energy Name Circle the vector quantities below and underline the scalar quantities below electric potential electric field electric potential energy

### Phys102 Second Major-181 Zero Version Coordinator: Kunwar, S Monday, November 19, 2018 Page: 1

Coordinator: Kunwar, S Monday, November 19, 2018 Page: 1 Q1. A neutral metal ball is suspended by a vertical string. When a positively charged insulating rod is placed near the ball (without touching),

### Class XII Chapter 1 Electric Charges And Fields Physics

Class XII Chapter 1 Electric Charges And Fields Physics Question 1.1: What is the force between two small charged spheres having charges of 2 10 7 C and 3 10 7 C placed 30 cm apart in air? Answer: Repulsive

### Consider a point P on the line joining the two charges, as shown in the given figure.

Question 2.1: Two charges 5 10 8 C and 3 10 8 C are located 16 cm apart. At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.

### Phys102 Second Major-133 Zero Version Coordinator: A.A.Naqvi Tuesday, August 05, 2014 Page: 1

Coordinator: A.A.Naqvi Tuesday, August 05, 2014 Page: 1 Q1. igure 1 shows four situations in which a central proton (P) is surrounded by protons or electrons fixed in place along a half-circle. The angles

### is at the origin, and charge q μc be located if the net force on q

Term: 152 Saturday, April 09, 2016 Page: 1 Q1. Three point charges are arranged along the x-axis. Charge q 3.0 0 μc 1 is at the origin, and charge q 5.0 0 μc 2 is at x = 0.200 m. Where should a third charge

### ELECTROSTATICS (Important formulae and Concepts) I Electric charges and Coulomb s law

ELECTROSTATICS (Important formulae and Concepts) I Electric charges and Coulomb s law II Electric Field and Electric Dipole www.nrpschool.com www.nrpschool.com III ELECTRIC POTENTIAL www.nrpschool.com

### LESSON 2 PHYSICS NOTES

LESSON 2 ELECTROSTATIC POTENTIAL AND CAPACITANCE SECTION I ELECTROSTATIC POTENTIAL ELECTRIC FIELD IS CONSERVATIVE In an electric field work done by the electric field in moving a unit positive charge from

### shown in Fig. 4, is initially uncharged. How much energy is stored in the two capacitors after the switch S is closed for long time?

Chapter 25 Term 083 Q13. Each of the two 25-µF capacitors, as shown in Fig. 3, is initially uncharged. How many Coulombs of charge pass through ammeter A after the switch S is closed for long time? A)

### Chapter 1 The Electric Force

Chapter 1 The Electric Force 1. Properties of the Electric Charges 1- There are two kinds of the electric charges in the nature, which are positive and negative charges. - The charges of opposite sign

### F 13. The two forces are shown if Q 2 and Q 3 are connected, their charges are equal. F 12 = F 13 only choice A is possible. Ans: Q2.

Q1. Three fixed point charges are arranged as shown in Figure 1, where initially Q 1 = 10 µc, Q = 15 µc, and Q 3 = 5 µc. If charges Q and Q 3 are connected by a very thin conducting wire and then disconnected,

### The third charge has to be along the line joining the two charges, outside the two charges, and closer to the weaker.

Coordinator: Dr. M.F.Al-Kuhaili Thursday, uly 30, 2015 Page: 1 Q1. Two point charges q and 4q are at x = 0 and L, respectively. A third charge q is to be placed such that the net force on it is zero. What

### PHYS 102 SECOND MAJOR EXAM TERM 011

PHYS 102 SECOND MAJOR EXAM TERM 011 * QUESTION NO: 1 An infinite non-conducting sheet has a surface charge density 0.10*10**(-6) C/m**2 on one side. How far apart are equipotential surfaces whose potentials

### Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation.

Use the following to answer question 1. Two point charges, A and B, lie along a line separated by a distance L. The point x is the midpoint of their separation. 1. Which combination of charges would yield

### Electrostatic Potential and Capacitance Examples from NCERT Text Book

Electrostatic Potential and Capacitance Examples from NCERT Text Book 1. (a) Calculate the potential at a point P due to a charge of 4 10 located 9 cm away. (b) Hence obtain the done in bringing a charge

### PHYSICS WORKSHEET CLASS : XII

PHYSICS WORKSHEET CLASS : XII Chapter 2 Topic: Electrostatic potential and Capacitance LEVEL 1 1. Define electric potential. Derive the expression for the electric potential at any point due to a point

### CAPACITANCE Parallel-plates capacitor E + V 1 + V 2 - V 1 = + - E = A: Area of the plates. = E d V 1 - V 2. V = E d = Q =

Andres La Rosa Portland State University Lecture Notes PH212 CAPACITANCE Parallelplates capacitor 1 2 Q Q E V 1 V 2 V 2 V 1 = 2 E E is assumed to be uniform between the plates Q Q V (Battery) V 2 V 1 =

### Questions A hair dryer is rated as 1200 W, 120 V. Its effective internal resistance is (A) 0.1 Ω (B) 10 Ω (C) 12Ω (D) 120 Ω (E) 1440 Ω

Questions 4-41 36. Three 1/ µf capacitors are connected in series as shown in the diagram above. The capacitance of the combination is (A).1 µf (B) 1 µf (C) /3 µf (D) ½ µf (E) 1/6 µf 37. A hair dryer is

### NAME Write you name also on the back page of this exam.

7/25/211 Physics 212 Exam-2 NAME Write you name also on the back page of this exam. Use o = 9 x 1 9 N.m 2 /C 2, g = 1 m/s 2 1. The figure shows the cross section of a family of parallel equipotential surfaces

Electrostatic:- It is a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges with no acceleration. Coulomb s Law:- It states that the electro-static

### Chapter 10. Electrostatics

Chapter 10 Electrostatics 3 4 AP Physics Multiple Choice Practice Electrostatics 1. The electron volt is a measure of (A) charge (B) energy (C) impulse (D) momentum (E) velocity. A solid conducting sphere

### 1. zero. Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is

Week 5 Where an electric field line crosses an equipotential surface, the angle between the field line and the equipotential is 1. zero 2. between zero and 90 3. 90 4. not enough information given to

### Chapter Assignment Solutions

Chapter 20-21 Assignment Solutions Table of Contents Page 558 #22, 24, 29, 31, 36, 37, 40, 43-48... 1 Lightning Worksheet (Transparency 20-4)... 4 Page 584 #42-46, 58-61, 66-69, 76-79, 84-86... 5 Chapter

### Electrostatics. 4πε 2) + Q / 2 4) 4 Q

Two spheres A and B of radius a and b respectively are at the same potential The ratio of the surface charge density of A to B is: ) a / b ) b / a a / b b / a Two free protons are separated by a distance

### Reading: Electrostatics 3. Key concepts: Capacitance, energy storage, dielectrics, energy in the E-field.

Reading: Electrostatics 3. Key concepts: Capacitance, energy storage, dielectrics, energy in the E-field. 1.! Questions about charging and discharging capacitors. When an uncharged capacitor is connected

### JSR INSTITUTE (PHYSICS) XII ASSINGMENT 1 (CAPACITANCE)

Physics J S R ESTD:007 JSR INSTITUTE (PHYSIS) XII ASSINGMENT (APAITANE). A capacitor of capacitance, which is initially charged up to a potential difference, is connected with a battery of emf / such that

### AP Physics C Electricity & Magnetism Mid Term Review

AP Physics C Electricity & Magnetism Mid Term Review 1984 37. When lighted, a 100-watt light bulb operating on a 110-volt household circuit has a resistance closest to (A) 10-2 Ω (B) 10-1 Ω (C) 1 Ω (D)

Question 1.1: What is the force between two small charged spheres having charges of 2 10 7 C and 3 10 7 C placed 30 cm apart in air? Repulsive force of magnitude 6 10 3 N Charge on the first sphere, q

### Electric Force and Coulombs Law

Electric Force and Coulombs Law 1 Coulombs law is an inverse squared law prove this graphically / experimentally 2 NOTE: THIS IS ONLY FOR POINT CHARGES. Schematics I.) +5C 3C II.) Q Q 3 III.) more than

### Electric Field of a uniformly Charged Thin Spherical Shell

Electric Field of a uniformly Charged Thin Spherical Shell The calculation of the field outside the shell is identical to that of a point charge. The electric field inside the shell is zero. What are the

### Summary of electrostatics

Summary of electrostatics 1 In electrostatics we deal with the electric effects of charges at rest. Electric charge can be defined as is the intrinsic characteristic that is associated with fundamental

### [1] (b) Fig. 1.1 shows a circuit consisting of a resistor and a capacitor of capacitance 4.5 μf. Fig. 1.1

1 (a) Define capacitance..... [1] (b) Fig. 1.1 shows a circuit consisting of a resistor and a capacitor of capacitance 4.5 μf. S 1 S 2 6.3 V 4.5 μf Fig. 1.1 Switch S 1 is closed and switch S 2 is left

### 1) Electric charge is quantized. TRUE 1) 2) A positive charge placed in an electric field experiences a force in the direction of the field.

Exam 1 review Name TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Electric charge is quantized. TRUE 1) 2) A positive charge placed in an electric field experiences

### Chapter Electrostatic Potential and Capacitance

Chapter Electrostatic Potential and Capacitance C/ 2 C/2 Ans: Q6. MockTime.com Q1. A 4µF conductor is charged to 400 volts and then its plates are joined through a resistance of 1 kω. The heat produced

### DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT SUBJECT- PHYSICS (042) CLASS -XII

Chapter 1(Electric charges & Fields) DEHRADUN PUBLIC SCHOOL I TERM ASSIGNMENT 2016-17 SUBJECT- PHYSICS (042) CLASS -XII 1. Why do the electric field lines never cross each other? [2014] 2. If the total

### PHYSICS 222 Fall 2009 EXAM 1: October 1, :00pm 10:00pm

PHYSICS 222 Fall 2009 EXAM 1: October 1, 2009 8:00pm 10:00pm Name (printed): Recitation Instructor: Section # INSTRUCTIONS: This exam contains 25 multiple-choice questions, plus two extra-credit questions,

### Phys102 Second Major-161 Zero Version Coordinator: Dr. Naqvi Monday, December 12, 2016 Page: 1

Coordinator: Dr. Naqvi Monday, December 12, 2016 Page: 1 Q1. Two point charges, with charges q1 and q2, are placed a distance r apart. Which of the following statements is TRUE if the electric field due

### Chapter 25. Capacitance

Chapter 25 Capacitance 1 1. Capacitors A capacitor is a twoterminal device that stores electric energy. 2 2. Capacitance The figure shows the basic elements of any capacitor two isolated conductors of

### Q1. Three point charges are arranged as shown in FIGURE 1. Find the magnitude of the net electrostatic force on the point charge at the origin.

Coordinator: Saleem Rao Monday, May 01, 2017 Page: 1 Q1. Three point charges are arranged as shown in FIGURE 1. Find the magnitude of the net electrostatic force on the point charge at the origin. A) 1.38

### Exam 1 Multiple Choice Practice Problems Physics 1251 TA: Clark/Sullivan

Exam 1 Multiple Choice Practice Problems Physics 1251 TA: Clark/Sullivan Disclaimer: We have ZERO intel about what will be covered on the midterm. This is a collection of problems that will force you to

### Potential from a distribution of charges = 1

Lecture 7 Potential from a distribution of charges V = 1 4 0 X Smooth distribution i q i r i V = 1 4 0 X i q i r i = 1 4 0 Z r dv Calculating the electric potential from a group of point charges is usually

### CHAPTER 15 PRE-TEST: ELECTRIC FORCE AND FIELDS

Class: Date: CHAPTER 5 PRE-TEST: ELECTRIC FORCE AND FIELDS Multiple Choice Identify the choice that best completes the statement or answers the question.. What happens when a rubber rod is rubbed with

### PRACTICE EXAM 1 for Midterm 1

PRACTICE EXAM 1 for Midterm 1 Multiple Choice Questions 1) The figure shows three electric charges labeled Q 1, Q 2, Q 3, and some electric field lines in the region surrounding the charges. What are the

### Phys 2102 Spring 2002 Exam 1

Phys 2102 Spring 2002 Exam 1 February 19, 2002 1. When a positively charged conductor touches a neutral conductor, the neutral conductor will: (a) Lose protons (b) Gain electrons (c) Stay neutral (d) Lose

### Mansfield Independent School District AP Physics C: Electricity and Magnetism Year at a Glance

Mansfield Independent School District AP Physics C: Electricity and Magnetism Year at a Glance First Six-Weeks Second Six-Weeks Third Six-Weeks Lab safety Lab practices and ethical practices Math and Calculus

### +2Q -2Q. (a) 672 N m 2 /C (b) 321 N m 2 /C (c) 105 N m 2 /C (d) 132 N m 2 /C (e) 251 N m 2 /C

1. The figure below shows 4 point charges located on a circle centered about the origin. The exact locations of the charges on the circle are not given. What can you say about the electric potential created

### General Physics (PHY 2140)

General Physics (PHY 2140) Lecture 5 Electrostatics Electrical energy potential difference and electric potential potential energy of charged conductors Capacitance and capacitors http://www.physics.wayne.edu/~apetrov/phy2140/

### This is known as charge quantization. Neutral particles, like neutron and photon have zero charge.

Electrostatics Quantization of Charge Objectives In this lecture you will learn the following Quantization Of Charge and its measurement Coulomb's Law of force between electric charge Superposition principle

### STATIC ELECTRICITY & CAPACITANCE: Solutions to higher level questions

STATIC ELECTRICITY & CAPACITANCE: Solutions to higher level questions 2015 Question 8 (i) Define electric field strength. E = force per unit charge (ii) Draw a labelled diagram of a gold leaf electroscope.

### FIRST TERM EXAMINATION (07 SEPT 2015) Paper - PHYSICS Class XII (SET B) Time: 3hrs. MM: 70

FIRST TERM EXAMINATION (07 SEPT 205) Paper - PHYSICS Class XII (SET B) Time: 3hrs. MM: 70 Instructions:. All questions are compulsory. 2. Q.no. to 5 carry mark each. 3. Q.no. 6 to 0 carry 2 marks each.

### TEAM MEMBERS. Sl. No. Name Designation. 1. Sh. Pundrikaksh Kaudinya Vice-Principal. 2. Sh. Kulbir Singh Antil P.G.T. (Physics) R.P.V.V.

TEAM MEMBERS Sl. No. Name Designation 1. Sh. Pundrikaksh Kaudinya Vice-Principal Group Leader R.P.V.V., Kishan Ganj, Delhi-110007. Sh. Kulbir Singh Antil P.G.T. (Physics) Member R.P.V.V., Kishan Ganj,

### Physics 420 Fall 2004 Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers.

Quiz 1 Wednesday This quiz is worth 6 points. Be sure to show your work and label your final answers. 1. A charge q 1 = +5.0 nc is located on the y-axis, 15 µm above the origin, while another charge q

### End-of-Chapter Exercises

End-of-Chapter Exercises Exercises 1 12 are primarily conceptual questions designed to see whether you understand the main concepts of the chapter. 1. (a) If the electric field at a particular point is

### CPS lesson Electric Field ANSWER KEY

CPS lesson Electric Field ANSWER KEY 1. A positively charged rod is brought near a conducting sphere on an insulated base. The opposite side of the sphere is briefly grounded. If the rod is now withdrawn,

### Physics 202 Midterm 1 Practice Exam

Physics 202 Midterm 1 Practice Exam Name: Student ID: Section: TA (please circle): Daniel Crow Scott Douglas Yutao Gong Taylor Klaus Aaron Levine Andrew Loveridge Jason Milhone Hojin Yoo Instructions:

### 104 Practice Exam 1-2/21/02

104 Practice Exam 1-2/21/02 1. One mole of a substance contains 6.02 > 10 23 protons and an equal number of electrons. If the protons could somehow be separated from the electrons and placed in separate

### Chapter 2: Capacitor And Dielectrics

hapter 2: apacitor And Dielectrics In this chapter, we are going to discuss the different ways that a capacitor could be arranged in a circuit and how its capacitance could be increased. Overview apacitor

### How many electrons are transferred to the negative plate of the capacitor during this charging process? D (Total 1 mark)

Q1.n uncharged 4.7 nf capacitor is connected to a 1.5 V supply and becomes fully charged. How many electrons are transferred to the negative plate of the capacitor during this charging process? 2.2 10

### P202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova

P202 Practice Exam 1 Spring 2004 Instructor: Prof. Sinova Name: Date: 1. Each of three objects has a net charge. Objects A and B attract one another. Objects B and C also attract one another, but objects

### Exam 1 Solutions. The ratio of forces is 1.0, as can be seen from Coulomb s law or Newton s third law.

Prof. Eugene Dunnam Prof. Paul Avery Feb. 6, 007 Exam 1 Solutions 1. A charge Q 1 and a charge Q = 1000Q 1 are located 5 cm apart. The ratio of the electrostatic force on Q 1 to that on Q is: (1) none

### free space (vacuum) permittivity [ F/m]

Electrostatic Fields Electrostatic fields are static (time-invariant) electric fields produced by static (stationary) charge distributions. The mathematical definition of the electrostatic field is derived

### Exam 1 Solutions. Note that there are several variations of some problems, indicated by choices in parentheses. Problem 1

Exam 1 Solutions Note that there are several variations of some problems, indicated by choices in parentheses. Problem 1 A rod of charge per unit length λ is surrounded by a conducting, concentric cylinder

### EL FORCE and EL FIELD HW-PRACTICE 2016

1 EL FORCE and EL FIELD HW-PRACTICE 2016 1.A difference between electrical forces and gravitational forces is that electrical forces include a. separation distance. b. repulsive interactions. c. the inverse

### Where, ε 0 = Permittivity of free space and = Nm 2 C 2 Therefore, force

Exercises Question.: What is the force between two small charged spheres having charges of 2 0 7 C and 3 0 7 C placed 30 cm apart in air? Answer.: Repulsive force of magnitude 6 0 3 N Charge on the first

### Electric Potential Energy Conservative Force

Electric Potential Energy Conservative Force Conservative force or field is a force field in which the total mechanical energy of an isolated system is conserved. Examples, Gravitation, Electrostatic,

### Electric Fields Part 1: Coulomb s Law

Electric Fields Part 1: Coulomb s Law F F Last modified: 07/02/2018 Contents Links Electric Charge & Coulomb s Law Electric Charge Coulomb s Law Example 1: Coulomb s Law Electric Field Electric Field Vector

### AP Physics C. Magnetism - Term 4

AP Physics C Magnetism - Term 4 Interest Packet Term Introduction: AP Physics has been specifically designed to build on physics knowledge previously acquired for a more in depth understanding of the world

### 1. How much charge is stored in a capacitor, whose capacitance C = 2µF, connected to a 12V battery?

IMP 113: 2 nd test (Union College: Spring 2010) Instructions: 1. Read all directions. 2. In keeping with the Union College policy on academic honesty, you should neither accept nor provide unauthorized

### c. They have electric charges that move freely d. Electrons are added to the rod a. charges are of unlike signs b. charges are of like signs

Physics Review Chapter 17 & 18 Name: Date: Period: 1. What sentence best characterizes electron conductors? a. They have low mass density b. They have high tensile strength c. They have electric charges

### A) I B) II C) III D) IV E) V

1. A square loop of wire moves with a constant speed v from a field-free region into a region of uniform B field, as shown. Which of the five graphs correctly shows the induced current i in the loop as

### Electric Potential Practice Problems

Electric Potential Practice Problems AP Physics Name Multiple Choice 1. A negative charge is placed on a conducting sphere. Which statement is true about the charge distribution (A) Concentrated at the

### Chapter 25. Capacitance

Chapter 25 Capacitance 25.2: Capacitance: 25.2: Capacitance: When a capacitor is charged, its plates have charges of equal magnitudes but opposite signs: q+ and q-. However, we refer to the charge of a

### UNIT 102-2: ELECTRIC POTENTIAL AND CAPACITANCE Approximate time two 100-minute sessions

Name St.No. Date(YY/MM/DD) / / Section UNIT 1022: ELECTRIC POTENTIAL AND CAPACITANCE Approximate time two 100minute sessions I get a real charge out of capacitors. P. W. Laws OBJECTIVES 1. To understand

### 2 Coulomb s Law and Electric Field 23.13, 23.17, 23.23, 23.25, 23.26, 23.27, 23.62, 23.77, 23.78

College of Engineering and Technology Department of Basic and Applied Sciences PHYSICS I Sheet Suggested Problems 1 Vectors 2 Coulomb s Law and Electric Field 23.13, 23.17, 23.23, 23.25, 23.26, 23.27,

### Question 1. The figure shows four pairs of charged particles. For each pair, let V = 0 at infinity and consider V net at points on the x axis.

Question 1 The figure shows four pairs of charged particles. For each pair, let V = 0 at infinity and consider V net at points on the x axis. For which pairs is there a point at which V net = 0 between

### Electrostatics. Electrical properties generated by static charges. Introduction

Electrostatics Electrical properties generated by static charges Introduction First Greek discovery Found that amber, when rubbed, became electrified and attracted pieces of straw or feathers Introduction