paper-1 mock paper 2015

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1. An extension-load graph is plotted to show the result of increasing the load on a spring. Which point marks the limit of proportionality for this spring? 2. An object is falling under gravity with terminal velocity. What is happening to its speed? A It is decreasing to a lower value. B It is decreasing to zero. C It is increasing. D It is staying constant. 3. A person just supports a mass of 20 kg suspended from a rope. 4. Which of the following groups of physical quantities consists only of scalars? A acceleration, force, velocity B acceleration, mass, speed C force, time, velocity D mass, speed, time 5. A driver’s foot presses with a steady force of 20 N on a pedal in a car as shown. 1

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O level Physics MCQ/Paper-1Mock

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1. An extension-load graph is plotted to show the result of increasing the load on a spring.

Which point marks the limit of proportionality for this spring?

2. An object is falling under gravity with terminal velocity. What is happening to its speed?

A It is decreasing to a lower value.

B It is decreasing to zero.

C It is increasing.

D It is staying constant.3. A person just supports a mass of 20 kg suspended from a rope.

4. Which of the following groups of physical quantities consists only of scalars?

A acceleration, force, velocity

B acceleration, mass, speed

C force, time, velocity

D mass, speed, time5. A drivers foot presses with a steady force of 20 N on a pedal in a car as shown.

What is the force F pulling on the piston?

A 2.5 N B 10 N C 100 N D 160 N

6. Ten identical steel balls, each of mass 27 g, are immersed in a measuring cylinder containing 20 of water. The reading of the water level rises to 50 .

What is the density of the steel?

A 0.90 g/

B 8.1 g/

C 9.0 g/

D 13.5 g/7. The diagram shows a simple mercury barometer. Which height is a measure of the atmospheric pressure?

8. Which energy changes take place when a pedaling cyclist uses a generator (dynamo) to light his bicycle lamp?

A chemical kinetic electrical light

B electrical chemical kinetic light

C kinetic chemical light electrical

D light electrical kinetic chemical

9. A substance consists of particles that are close together and moving past each other at random. The average speed of the particles is gradually increasing. What best describes the substance?

A a liquid being boiled to form a gas

B a liquid being heated

C a solid being heated

D a solid being melted to form a liquid10. The diagram shows a vacuum flask and an enlarged view of a section through the flask wall.The main reason for the silvering is to reduce heat transfer by

A conduction only.

B radiation only.

C conduction and convection.

D convection and radiation.11. A new liquid is tested to decide whether it is suitable for use in a liquid-in-glass thermometer.

It is found that the liquid does not expand uniformly with temperature. What will be the effect of this on the scale of the thermometer?

A It has a short range.

B It is not linear.

C The markings are too close together.

D The markings are too far apart.

12. A liquid-in-glass thermometer consists of a bulb containing a liquid. The liquid can expand into a very thin capillary tube.

The liquid in the thermometer is replaced by another liquid that expands more for the same temperature rise. The new thermometer will have

A greater sensitivity and greater range.

B greater sensitivity but less range.

C the same sensitivity and the same range.

D the same sensitivity but greater range.

13. The fillings for a hole in a tooth should be made from a material thatA expands more than the hole in the tooth.

B expands by the same amount as the hole in the tooth.

C expands less than the hole in the tooth.

D does not expand when heated.

14. Heat energy is supplied at the same rate to 100 g of paraffin and to 100 g of water in similar

containers. Why does the temperature of the paraffin rise more quickly?

A The paraffin has a larger specific heat capacity than water.

B The paraffin has a smaller specific heat capacity than water.

C The paraffin is less dense than water.

D The paraffin is more dense than water.

15. What does not affect the pressure at a point beneath the surface of a liquid?

A area of the liquid surface

B density of the liquid

C depth of the point below the surface

D strength of the gravitational field16. The diagram shows a thick copper plate that is very hot. One side is black, the other is shiny.

A student places her hands the same distance from each side as shown.

Her left hand feels warmer than her right hand. Which statement is the correct conclusion from the experiment?

A The black side is hotter than the shiny one.

B The black side radiates more heat.

C The shiny side radiates more heat.

D The shiny side is cooling down faster than the black side17. Which characteristics describe an image formed in a plane mirror?

A real and inverted

B virtual and upright

C real and larger than the object

D virtual and smaller than the object

18. An electrical quantity is defined as the energy converted by a source in driving a unit charge

round a complete circuit. What is this quantity called?

A current

B electromotive force

C potential difference

D power

19. Which conclusion can be drawn from the Geiger-Marsden alpha-particle scattering experiment?

A A positive charge is spread throughout the atom.

B Electrons are arranged in orbits.

C Electrons are negatively charged.

D There is a dense nucleus in the atom.

20. The diagram shows an object O placed 3 cm away from a converging lens of focal length 6cm.

21. Wave forms are shown on an oscilloscope for a flute and a bassoon playing the same note. The oscilloscope settings are the same for both wave forms.

22. The dipper in a ripple tank vibrates at a frequency of 4.0 Hz and the resulting wave pattern is

photographed. The distance between the two crests shown is 20 cm.

23. Waves pass from deep water to shallow water and refraction occurs.

24. Light rays are deviated by a prism.

The deviation angle d is measured for light rays of different frequency, including blue light and red light. Which graph is correct?

25. How much energy is converted in a resistor of 5.0 carrying a current of 2.0 A for 10 seconds?

A 4.0 J

B 25 J

C 100 J

D 200 J

26. Why is a transformer used to connect a generator in a power station to a long distance transmission line?

A to decrease the voltage and decrease the current

B to decrease the voltage and increase the current

C to increase the voltage and decrease the current

D to increase the voltage and increase the current

27. Density changes are responsible for which method of thermal energy transfer?

A conduction only

B convection only

C radiation only

D conduction, convection and radiation28. A lens forms a blurred image of an object on a screen.

29. A boy strikes a rigid metal fence with a stick to create a sound along the fence. A girl listens with her ear against the fence. One second after the fence is struck, the girl hears a sound through the air.

30. A detector is used to measure the count-rate near a radioactive source. The reading is 4000 counts per minute. After 30 minutes the count-rate has fallen to 500 counts per minute.

What is the half-life of the radioactive source? You may ignore the effects of background radiation.

A 3 minutes

B 5 minutes

C 6 minutes

D 10 minutes

31. The diagrams show an iron nail in four different situations. In which diagram will the nail become an induced magnet?

32. The diagram shows parts of a loudspeaker.

33. In an electrostatics experiment, a plastic rod is rubbed with a cloth. The cloth becomes negatively charged. Which diagram shows the charge on the rod, and describes the movement of charge?

34. Diagram 1 shows a resistor connected to a battery, an ammeter and a voltmeter.

The ammeter reading is 0.5 A and the voltmeter reading is 3.0 V. A second identical resistor is now connected in parallel with the first resistor, as shown in diagram 2.

35. Two parallel wires carry currents in the same direction. Which diagram shows the magnetic field around each wire and the direction of the force on each wire?

36. A permanent magnet moving up and down on the end of a spring induces an e.m.f. in a coil.

Which factor, on its own, would decrease the maximum value of the induced e.m.f.?

A increasing the number of turns in the coil

B increasing the strength of the magnet

C raising the coil

D raising the support of the spring37. The diagram shows the output waveform of an a.c. generator as displayed on a cathode-ray

oscilloscope. The horizontal scale is 5 ms / cm.

38. A house-owner replaces a failed fuse for the lights of the house. When the lights are switched on the second fuse also fails. The house-owner then uses a third fuse with a higher rating than the previous two.

Why is this not a sensible thing to do?

A Fuses only allow the circuit to work if the rating is exactly right.

B The third fuse will melt because the rating is too high.

C Using a fuse with too high a rating causes electric shocks.

D The circuit may work, but the fault is not corrected.39. A wire has a resistance of 8 . A second wire, made of the same material, has half the length and twice the cross-sectional area. What is the resistance of the second wire?

A 1

B 2

C 8

D 1640. Which of the following would cost the least if operated from the same voltage supply?

A a 5000 W electric cooker used for 1 minute

B a 1000 W electric fire used for 10 minutes

C a 500 W electric iron used for 1 hour

D a 100 W lamp used for 1 day

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