إجابة السؤال األول : [ 01 ] درجات

Transcription

1 الدور األول املرحلة الثانية جوهىرية هصر العربية وزارة التربية والتعلين اهتحاى شهادة إتوام الذراسة الثانىية العاهة لعام 10 م نموذج إجابة امتحان مادة [ الفيزياء باإلنجليزية ] الدرجة الكلية درجة النهاية الصغرى 10 درجة ث.ع / أول Each question ( 01 marks) Five questions x 01 marks 01 mark Question (0) (a) ( 4 X 1 mark 4 marks ) The equipment The use 1- The mercury barometer Measure the atmospheric pressure - Dewar's flask Store liquid gases 3- The electric motor Convert electric energy into mechanical energy Increase total resistance of the apparatus so the 4- The multiplier resistor in voltmeter voltmeter must draw a negligible current so that it will not affect the voltage drop to be measured. ( إذا ذكر الطبلت الفكرة دون شرح يحتست له نصف درجة ) marks (b) ( 3 X 0 mark 3 ) (c) The equipment 1-The optical fibers - Laser 3- induction furnaces إجابة السؤال األول : [ 01 ] درجات Explanation of the scientific idea When light rays incident with an angle more than critical angle, several total internal reflections takes place Laser depends on driving the atoms or molecules of the active medium into a state of population inversion If the magnetic flux changes with time through a solid conductor currents will be induced in closed paths in the conductor, these are called eddy current, these currents have a heat effect enough to melt metals n o (1 mark) n (1 mark) A (1/ mark) (1)

2 1 إجابة 03. امتحان مادة [ الفيزياء باإلنجليزية ] A نموذج ' (1/ mark) إجابة السؤال الثانى : [ 01 ] درجات Answer of question (8): (a) ( 9 X 0 mark 9 marks ) 1- It is the tangential force acting on unit area, resulting in unit velocity difference between two layers, separated by unit distance - The ratio between the angular dispersion between blue and red to the deviation of yellow light Or 3- An image with 3D details, as the reflected beam and the reference beam meet at the photographic plate, and interference takes place. After the photographic plate is developed, resulting interference fringes appear coded. 4- It is the minimum energy needed to free an electron from the surface. (b) ( 6 x ½ marks 3 marks ) The unit equivalent unit physical quantity Henry V.s/Ampere or Ω.s Coefficient of induction N/m Pascal or kg.m -1 s - or J/m 3 Pressure weber/m Tesla or N/Ampere.m Magnetic flux density (c) ( 3 X 1 mark 3 marks ) 1- N p 5555 turns (1 mark) - power of sec coil V s I s I s A (1 mark) ))

3 3- mark) 54 A (1 نموذج p إجابةI امتحان مادة [ الفيزياء باإلنجليزية ] إجابة السؤال الثالج : [ 01 ] درجات Answer question (3): (a): ( 4 X 1 mark 4 marks ) 1-The mechanical advantage of hydraulic press. - Sensitivity of a galvanometer. 3- Wien's Law 4- Beats. (b) (3 marks ) 1- Factors affecting magnetic force: (1 mark) 1)- Magnetic flux density. )- The length of the wire. 1 3)- The current intensity passing in the wire. The mathematical relation is F B I L (1/ mark) Magnetic flux density is defined as : The affected normal force acting on a wire of length 1m carrying current 1ampere. (1 mark) (c) ( 3 marks ) Pressure in Cm Hg Volume in Cm Temperature in Celsius 7 o C o C ) 19731k يحتست له نصف درجة ( )3) هلحىظة: إذا ذكر الطبلت درجة الحرارة المجهىلة ثبلدرجة الكلفنية

4 نموذج إجابة امتحان مادة [ الفيزياء باإلنجليزية ] Answer question ( 9 ): (a) ( 9 X 0 mark 9 marks ) 1- When the prism in the position of minimum deviation. - When these metals are at very low temperature ( near zero kelvin ) 3- When the frequency of the incident ray is equal or more than its critical value. 4- As the wire moves in a direction parallel to magnetic flux lines. (b) ( 3 X 0 mark 3 marks ) Fleming's left hand rule Ampere's right hand rule Used to determine the direction of the force (motion) acting on a wire carrying current flowing perpendicularly to a magnetic field. current in a wire. Spontaneous emission stimulated emissions Occurs when the atom relaxes from an excited state to a lower state, emitting spontaneously the energy difference in the form of a photon without the effect of an external photon after the lifetime interval is over. Destructive interference constructive interference The path difference is ( m + ½ ) λ The path difference is ( mλ ) (c)( 3 marks ) إجابة السؤال الرابع : [ 01 ] درجات K.E 3 KT Used to determine the direction of the magnetic field resulting from an electric Occurs where an external photon stimulates excited atomsto emit the energy difference is the form of a photon before the lifetime interval is over. 36x15 - T 1739 o K PV n R T 3 x 138 x15-3 T )4)

5 باإلنجليزية ] n نموذج إجابة امتحان مادة [ الفيزياء 33 mole إجابة السؤال الخاهس : [ 01 ] درجات Answer question (0) : (a) ( 9 X 0 mark 9 marks ) 1- - one wavelength 3- less than 4- less than one (b) ( 3 marks ) Suppose that you have a tube ( ab ) with different cross-sectional area A 1 & A as shown The tube is filled completely with a liquid in steady flow: )1 V 8 A 8 b The mass rate of flow at ( a ) is Q m1 A 1 The mass rate of flow at ( b ) is Q m A v In steady flow Q m1 Q m v 1 A 0 A 1 V 1 A V V 0 A 1 v 1 A v (c) ( 3 marks ) في حبلة إيجبد المقبومة المكبفئة ف خطىة واحدة تحتست له الدرجة كبملة To calculate the equivalent resistance: 6Ω & 3Ω are in parallel R eq Ω The resistance 8Ω is connected in series with the previous 15Ω & 15Ω are in parallel a )1 I R eq +815 R t )5) 5 Ω A The potential difference for 3Ω & 6Ω V 1x volt 15

6 Current intensity in 6 Ω )1 نموذج إجابة امتحان مادة [ الفيزياء باإلنجليزية ] I 5. 33A إجابة السؤال السادس : [ 01 ] درجات Answer question ( 1 ): (a) ( 9 marks )( 9x0) 1- The refracted ray deviates near to the normal at the incidence point. Or ( the refracted angle becomes less than the incident angle ) - The distance between the fringes decreased. Or The sharpness of the fringes decrease that is because the distance ( d ) is inversely proportional with. 3- Attraction force is g enerated between them. 4- The alternating current converts into direct current. (b) ( 3 marks ) Steps: (8 marks ) 1- Consider two equal flasks; have the same capacity one of them is filled with oxygen and the other with carbon dioxide in a water bath. - Each flask is attached to a right angle thin tube contains (Hg) thread. 3- Pour hot water into the vessel. Observation: The mercury thread moves the same distance. Conclusion: CO O ( 1 water - At constant pressure equal volumes of different gases expand equally when heated through the same rise of temperature, at constant pressure (c) ( 3 marks ) ( درجة للرسم ) و ( درجة للضغط الجىي ) و ( درجة لحسبة الميل والكثبفة ) bar (1 mark) Slope Slope 15 4 (3 1.8) x10 (0 8) 5 (1/ mark) 1- From the graph P a 1 bar 1x15 5 N/m (1 mark) )6)

7 امتحان مادة [ الفيزياء باإلنجليزية ] ث ع / أول نموذج إجابة 97 Kg ) تابع /m( 3 er P a 1x15 5 N/m (1/ mark) [ انتهت اإلجابة ] )9)