Form 4 - Physics Exercises 5i1162

SCORE A EXCEL in SPM Paper 1 Choose the best option for each question. 1.

2.

The unit for specific heat capacity is J kg-1 K-1. A possible formula for finding the specific heat capacity. Power A. Mass x Temperature Temperature B. Mass x Heat Heat C. Mass x Temperature Heat D. Mass x Time

4.

Diagram 1 shows the scale of a vernier callipers. What is the reading of the callipers? A. 3.03 cm B. 3.13 cm C. 3.30 cm D. 3.43 cm

5.

Which of the following shooting marks shows that the shooter is accurate but inconsistence?

6.

A car is travelling at a speed of 80 km h-1. What is the speed in cms-1? A. 2.22 x 10-1 B. 2.22 x 102 C. 2.22 x 103 D. 2.22 x 104

7.

Which physical quantity has the correct Si unit? Physical quantity SI unit A Mass Gram B Time Minute C Temperature Kelvin D Current Coulomb

Diagram 1 shows the time measured y a stopwatch for the oscillation of a pendulum.

What is the time measured by the stopwatch. A. 30.7 s B. 32.0 s C. 32.5 s D. 33.0 s 3.

Diagram 2 shows the position of the eye when a student is taking the reading of the volume of water in a measuring cylinder.

This position will help to overcome A. random error B. parallax error C. zero error D. systematic error

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8. Diagram 1 is a graph which shows the relationship between s and t.

Which of the following relationship is correct? A. s = 8t + 16 B. s = 16t + 8 C. s = 2t + 16 D. s = -2t + 16 9. 500 km is equivalent to A. 5 x 102 m B. 5 x 103 m C. 5 x 104 m D. 5 x 105 m

10. Diagram 2 shows the velocity-time graph for the motion of an object. If the acceleration of the object is given by the gradient of the graph, calculate the acceleration of the object. A. 0.12 m s-2 B. 0.25 m s-2 C. 0.50 m s-2 D. 1.20 m s-2 E. 3.00 m s-2 11. Base quantities are quantities that A. are scalar only B. use SI units only C. are in the simplest form D. cannot be derived from other quantities 12. Which of the following is true? A. 1 m = 1000 km B. 1 ms = 0.001 s C. 1 MB = 1000 GB D. 1 nm = 0.001 pm

2.0 cm, which of the following shows that the readings are precise but not accurate?

14. Diagram 1 shows a wire winding round a pencil to measure its diameter by using a ruler.

The diameter of the wire is A. 0.08 cm B. 0.09 cm C. 0.80 cm D. 0.90 cm 15. Which of the following represents the radio frequency of 98.1 MHz? A. 9.81 x 10-3 Hz B. 9.81 x 10-1 Hz C. 9.81 x 105 Hz D. 9.81 x 107 Hz

16. Diagram 2 shows the graph of velocity, v against time, t. Which of the following relationship is correct? A. v = 10t B. v = 2t + 10 C. v = -2t + 10 D. v = -5t + 10

13. A student takes five readings when measuring the length of a nail. If the length of the nail is 2

17. The diagram shows the reading of a micrometer when the spindle is completely closed. What is the zero error of the micrometer screw gauge? A. -0.02 B. +0.02 C. -0.48 D. +0.48 18. The table shows the results obtained from an experiment to examine the resistivity of a wire.

21. Which physical quantities below is base quantity? A. Acceleration B. Mass C. Energy D. Velocity 22. State the error in measurement which can be reduced by taking a larger number of measurements and the average reading. A. Zero error B. Systematic error C. Random error D. End error 23. Which unit below is used to measure momentum? A. N B. N ms-1 C. kg m s-1 D. kg m s-2 24. Which graph below shows that y is directly proportional to x?

Which statement is true about the experiment? A. The smallest scale on the ammeter is 0.02 A B. The smallest scale on the voltmeter is 0.1 V. C. The length of the wire is the manipulate variable. D. The diameter of the wire is measured with a micrometer screw gauge. 19. Choose the correct matching of physical quantity with its SI unit. A. Period – second B. Time – minute C. Length – centimetre D. Electrical charge – ampere 20. Which step below can reduce parallax error while taking the reading from an ammeter? A. Use an ammeter with a smaller scale. B. Take repeated readings and find the average value. C. Use a magnifying lens to read the reading from the ammeter. D. Take the reading when the pointer coincides with the image of the mirror underneath.

25. Which measuring instrument is suitable to measure the width of school physical textbook? A. Micro screw gauge B. Vernier callipers C. Meter rule 26. Why is a micrometer not suitable for measuring the length of a wire? A. The wire cannot be straightened B. The wire is usually more than 25 cm C. It is not necessary to measure length to such an accuracy. D. A micrometer gives a reading of there decimal places.

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27. If the length of field is 500 m and the width is 200 m, what is the area of the field in scientific notation? A. 100 000 m B. 100 000 m2 C. 10 x 104 m2 D. 1.0 x 105 m2 28. Which quantity is correctly classified?

B. C. D.

kg-1 s 2 kg s kg-2 s-1

34. Express 1000000 cm2 in SI unit. A. 106 cm2 B. 1 x 106 cm2 C. 100 m2 D. 1 x 106 m2 35. Which expression shows the relationship between the base quantities for density? mass x length A. time time B. length x mass

29. Which derived quantity is obtained by multiplying two base quantities? A. Dencity B. Acceleration C. Area D. Velocity 30. Which pair of physical quantities have the same unit? A. Current and charges B. Voltage and emf C. Energy and power D. Work and force 31. Diagram 1 shows a micrometer screw gauge. What is the reading of the micrometer shown? A. 5.24 mm B. 5.64 mm C. 7.14 mm D. 7.64 mm

mass length x length x length mass x length D. length x length x time

C.

36. Which of the experimental errors is a systematic error? A. A stopwatch running too fast. B. The zero point of a metre ruler is not accurate. C. Variations in measurements of a pendulum’s length. D. Zero error of a micrometre screw gauge 37. Kasim, Ah Choon, Muthu and David are throwing four darts each at the target board. The positions of the darts are shown in A, B, C and D below. Whose throws are not accurate but precise?

32. Which experimental technique reduces the systematic error of a quantity investigated? A. Adjusting an ammeter to remove its zero error before measuring a current. B. Measuring the diameter of a wire repeatedly and calculating the average value. C. Timing a large number of oscillations to find a period. 33. The period of oscillation for an object is given as T = (km)1/2 where T = period, m = mass, k = constant. What is the derived unit for k? A. kg s2 4

Paper 2 Section A 1.

Diagram 1.1 shows a section of a ruler.

(a)

(b)

What is the sensitivity of the ruler? ____________________________ [1 mark] Two groups of students used the ruler to measure the length of a rod. The measurements they obtained are shown in Table 1. (i) Calculate the average of each group. Average of group A = ____________ Average of group B = ______________ Group A Group B (ii)

2.

12.35 cm 12.80 cm

12.25 cm 12.15 cm

12.40 cm 12.35 cm

12.20 cm 12.55 cm

If the actual length of the road is 12.40 cm, which group is more accurate in their measurements? _____________________________________________________________________ [1 mark]

Diagram 1.1 shows a measuring instrument X. (a) What is instrument X? ________________________________ [1 mark] (b)

Name the part labelled Y. ________________________________ [1 mark]

(c)

(d)

What is the accuracy of instrument X? ___________________________________________________________________________ [1 mark] Determine the size of the object in Diagram 1.1 if instrument X has zero error of +0.03 mm.

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3.

Diagram 1.1 shows a micrometer screw gauge being used to measure the diameter of a ball bearing. (a) (i) Name the part labelled X. _____________________ [1 mark] (ii) What is the function of X? _____________________________________________________________________ [1 mark] (b) What is the radius of the ball bearing? [2 marks]

4.

Diagram 1.1 shows a meter rule being used to measure the diameter of test tube. What is the value of the smallest division of the metre rule? (a) ________________________________________________ [1 mark] (b)

State one type of error that must be avoided when taking the reading. _______________________________________________________ [1 mark]

(c)

(d)

5.

What is the reading of the external radius of the test tube? ___________________________________________________________________________ [1 mark] What is the measuring instrument t that is more accurate to measure the external diameter of the test tube? [1 mark]

Diagram 1.1 shows two measuring scales P and Q. (a) Name the physical quantity measured by the measuring scales. ___________________________________________________________________________ 6

[1 mark] (b)

(i)

What is the value of the smallest division of measuring scale P? ___________________________________________________ [1 mark]

(ii)

What is the value of the smallest division of measuring scale Q? ___________________________________________________ [1 mark]

(c)

6.

Which measuring scale is more sensitive? ___________________________________________________________________________ [1 makr] Photographs 1(a) and (b) show two types of ammeters.

Photographs 1(a) and (b) (a)

(b)

(c)

State the physical quantity that these ammeters can measure. ___________________________________________________________________________ [1 mark] (i) Which ammeter is more sensitive? ____________________________ [1 mark] (ii) State one reason for your answer in 1(b)(i). _____________________________________________________________________ [1 mark] When an ammeter is not connected to any circuit, it is found that the pointer to the zero mark. (i) What type of error is this when the ammeter is used to measure current? _____________________________________________________________________ [1 mark] (ii) How can the error are corrected when a student has taken the measurement for current? _____________________________________________________________________ [1 mark]

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7.

Photographs 1.1 and 1.2 show two instruments used by students in the laboratory.

(a)

(i)

Name the instruments in Photograph 1.1 ________________________________

[1 mark] For the instruments in photograph 1.2, what is the function of the ratchet? _____________________________________________________________________ [1 mark] (iii) What is the sensitivity of the apparatus in Photograph 1.2? ______________________________________________ [1 mark] Between the instruments in photographs 1.1 and 1.2 (i) Which instruments is more sensitive? ______________________________ [1 mark] (ii) State one reason for your answer in 1(b)(i). _____________________________________________________________________ [1 mark] (ii)

(b)

8.

Look at Diagram 4.1 below. The result of the darts thrown by a boy D is shown by ‘X’.

(a)

(b)

Describe the result using the concept of consistency and accuracy. ___________________________________________________________________________ ___________________________________________________________________________ [2 marks] Thomas, Aina and Laveen also take part in the same darts competition. The result show that, (i) Thomas is consistence but not accurate, (ii) Ainaa is inaccurate and inconsistent (iii) Laveen is accurate and consistent Use the symbol “X” to represent a dart mark on the target board to show the possible positions of the four darts thrown by each of them. 8

(c)

[3 marks] Suggest two instruments that you have used in the laboratory that may be consistent but not accurate. ___________________________________________________________________________ ___________________________________________________________________________ [3 marks]

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