TSOKOS CHAP 1 TEST REVIEW

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1 IB PHYSICS Name: DEVIL PHYSICS Period: Date: BADDEST CLASS ON CAMPUS TSOKOS CHAP TEST REVIEW ORDERS OF MAGNITUDE AND UNITS 2. The resistie force F acting on a sphere of radius r moing at speed through a liquid is gien by F = cr where c is a constant. Which of the following is a correct unit for c? A. N B. N s C. N m 2 s D. N m 2 s 3. Sub-multiples of units may be expressed using a prefix. Which one of the following lists the prefixes in decreasing order of magnitude? A. centi- micro- milli- nano- B. milli- centi- nano- micro- C. centi- milli- micro- nano- D. milli- micro- centi- nano- SI SYSTEM 6. Which one of the following contains three fundamental units? A. Metre Kilogram Coulomb B. Second Ampere Newton C. Kilogram Ampere Kelin D. Kelin Coulomb Second ERRORS OF MEASUREMENT 7. The reading of a constant potential difference is made four times by a student. The readings are.76 V.78 V.77 V.76 V The student aerages these readings but does not take into account the zero error on the oltmeter. The aerage measurement of the potential difference is A. precise and accurate. B. precise but not accurate. C. accurate but not precise. D. not accurate and not precise. Chap Test Reiew.Doc Updated: 2-Sep-3 Page of 8

2 34. The length of a rod is measured using part of a metre rule that is graduated in millimetres, as shown below. 2 cm Which one of the following is the measurement, with its uncertainty, of the length of the rod? A cm B cm C cm D cm 5. A student uses a metre rule and a set-square to measure a series of ertical heights, as shown. set-square height to be measured metre rule The metre rule is not ertical. What type of error is reduced by using a set-square and what type of error is caused because the metre rule is not ertical? error reduced by use of set-square error caused by non-ertical ruler A. random random B. random systematic C. systematic random D. systematic systematic SIGNIFICANT DIGITS 2. When a oltage V of 2.2 V is applied to a DC motor, the current I in the motor is 0.20 A. Which one of the following is the output power VI of the motor gien to the correct appropriate number of significant digits? A. 2 W B. 2.4 W C W D W Chap Test Reiew.Doc Updated: 2-Sep-3 Page 2 of 8

3 3. Which of the following is the best estimate, to one significant digit, of the quantity shown? A..5 B. 2.0 C. 5.8 D. 6.0 π The molar mass of water is 8 g. The approximate number of water molecules in a glass of water is A B C D LINE_BEST_FIT 32. Values of current I in an electrical component and of the corresponding potential difference V across the component are plotted on a graph. Error bars for each point hae been included. Which one of the following shows the best-fit line for the plotted points? A. I B. I V V C. I D. I V V Chap Test Reiew.Doc Updated: 2-Sep-3 Page 3 of 8

4 4. The grid below shows one data point and its associated error bar on a graph. The x-axis is not shown. Which of the following is the correct statement of the y-alue of the data point, with its uncertainty? A B C D GETTING_LINEAR_GRAPHS The ariation with time t of the speed of an object is gien by the expression, = u + at, where u and a are constants. A graph of the ariation with time t of speed is plotted. Which one of the following correctly shows how the constants may be determined from this graph? A. B. 0 u 0 t gradient = a 0 0 t gradient = a u C. D. 0 0 u t gradient = a 0 0 u t gradient = a 9. An object of mass m is hung from a spring. When the object is pulled downwards and then released, the frequency f of oscillation of the object is gien by the expression f 2π m k where k is a constant. Which one of the following graphs would produce a straight-line for the ariation with mass m of frequency f? x-axis y-axis A. m f B. m f C. 2 m D. m f 2 f Chap Test Reiew.Doc Updated: 2-Sep-3 Page 4 of 8

5 42. The ariation with speed of the force F acting on an object is gien by the expression, F = p 2 + q, where p and q are constants. What quantity should be plotted on the y-axis of a graph and what should be plotted on the x-axis in order to gie a straight-line graph? y-axis x-axis A. F B. F 2 C. F D. F 2 VECTORS 5. Two forces of magnitudes 7 N and 5 N act at a point. Which one of the following is not a possible alue for the magnitude of the resultant force? A. N B. 3 N C. 5 N D. 7 N 9. Which one of the following is a scalar quantity? A. Pressure B. Impulse C. Magnetic field strength D. Weight 29. The diagram below shows two ectors, x and y. x y Which of the ectors below best represents the ector c that would satisfy the relation c = x + y? A. B. C. D. 33. Which one of the following includes three ector quantities? A. elocity weight field strength B. weight mass field strength C. elocity energy weight D. mass energy field strength Chap Test Reiew.Doc Updated: 2-Sep-3 Page 5 of 8

6 VECTOR_COMPONENTS 3. The diagram below shows a boat that is about to cross a rier in a direction perpendicular to the bank at a speed of 0.8 m s. The current flows at 0.6 m s in the direction shown. Bank 0.6 ms 0.8 ms Boat Bank The magnitude of the displacement of the boat 5 seconds after leaing the bank is A. 3 m. B. 4 m. C. 5 m. D. 7 m. LOGARITHMIC_FUNCTIONS 26. The relationship between two measured quantities P and Q is of the form, P = kq n where k and n are constants. A plot of lg P (y-axis) against lg Q (x-axis) will enable the alue of k to be determined by measuring only A. the intercept on the lg P axis. B. the intercept on the lg Q axis. C. the slope of the graph. D. the reciprocal of the slope of the graph. 35. The graph below shows the ariation with ln P of a quantity x. (ln P is the natural logarithm of the quantity P.) The magnitude of the gradient of the line is g. np np x Which one of the following is the correct expression for the ariation of P with x? A. P = P 0 e gx B. P = P 0 e +gx C. P = P 0 + e gx D. P = P 0 e +gx Chap Test Reiew.Doc Updated: 2-Sep-3 Page 6 of 8

7 49. The electrical resistance R of a component aries with temperature T according to the expression, R = R 0 e k/t where R 0 and k are constants. A graph of the ariation with T of lnr is drawn and a straight line is obtained. The intercept on the T axis is equal to A. lnr 0 B. ln R 0 k C. lnr 0 D. ln R 0 k ERROR_PROPAGATION 4. Natalie measures the mass and speed of a glider. The percentage uncertainty in her measurement of the mass is 3% and in the measurement of the speed is 0%. Her calculated alue of the kinetic energy of the glider will hae an uncertainty of A. 30%. B. 23%. C. 3%. D. 0%.. When a force F of ( ) N is applied to a mass m of (2.0 0.) kg, the percentage uncertainty attached to the alue of the calculated acceleration m F is A. 2%. B. 5%. C. 7%. D. 0%. 5. A student measures two lengths as follows: T = 0.0 S = cm 0. cm. The student calculates: F T, the fractional uncertainty in T F S, the fractional uncertainty in S F T S, the fractional uncertainty in (T S) F T+S, the fractional uncertainty in (T + S). Which of these uncertainties has the largest magnitude? A. F T B. F S C. F T S D. F T+S 38. The period T of oscillation of a mass m attached to the end of a spring is gien by T 2 m, k an accurately known constant. The mass is measured as kg. What is the percentage uncertainty in the calculated alue of the period? A. 3.0 B. 4.5 C. 9.0 D. 8 where k is Chap Test Reiew.Doc Updated: 2-Sep-3 Page 7 of 8

8 46. The olume V of a cylinder of height h and radius r is gien by the expression, V = r 2 h. In a particular experiment, r is to be determined from measurements of V and h. The uncertainties in V and in h are as shown below. The approximate uncertainty in r is A. 0. B. 5. C. 4. D. 2. DATA BASED QUESTIONS V 7 h 3 7. Data based question. This question is about change of electrical resistance with temperature. The table below gies alues of the resistance R of an electrical component for different alues of its temperature T. (Uncertainties in measurement are not shown.) (a) T/ C R/Ω On the grid, plot a graph to show the ariation with temperature T of the resistance R. Show alues on the temperature axis from T = 0 C to T = 0 C. (b) (i) Draw a cure that best fits the points you hae plotted. Extend your cure to coer the temperature range from 0 C to 0 C. (c) (ii) Use your graph to determine the resistance at 0 C and at 0 C. Resistance at 0 C = Resistance at 0 C = On your graph, draw a straight-line between the resistance alues at 0 C and at 0 C. This line shows the ariation with temperature (between 0 C and 0 C) of the resistance, assuming a linear change. (d) (i) Assuming a linear change of resistance with temperature, use your graph to determine the temperature at which the resistance is 3060 Ω. (ii) Temperature = C Use your answer in (d)(i) to calculate the percentage difference in the temperature for a resistance of 3060 Ω that results from assuming a linear change rather than the non-linear change Ω Ω Chap Test Reiew.Doc Updated: 2-Sep-3 Page 8 of 8