mock examination physics paper 2 - … mock paper 2 and keys.pdf · mock exam paper 2 mock...

Mock Exam Paper 2

MOCK EXAMINATION

PHYSICS PAPER 2

(1 hour)

1 When told to open this book, you should check that all questions are there. Look for the words

'END OF PAPER' after the last question.

2 All questions carry equal marks.

3 ANSWER ALL QUESTIONS. You should mark all your answers on the Answer Sheet.

4 You should mark only ONE answer for each question. If you mark more than one answer, you will

receive NO MARKS for that question.

5 No marks will be deducted for wrong answers.

Mock-CE

PHY

2

New Physics at Work

Mock Exam Paper 2 - 1 -

Oxford University Press 2005

Go on to the next page

There are 27 questions in Section A and 18 questions in Section B. The last page of this question

paper contains a list of physics formulae which you may find useful.

If necessary, take g = 10 m s2

.

Unless otherwise specified, all the cells are assumed to have

negligible internal resistance.

Section A

1 Which of the following correctly describes temperature, acceleration, speed and work done as

vector or scalar quantities?

Temperature Acceleration Speed Work done

A scalar scalar scalar scalar

B scalar vector scalar scalar

C scalar scalar vector scalar

D vector vector scalar vector

2 If the acceleration of car X is 8 m s2

and that of car Y is 6 m s2

, which of the following

statements must be correct?

(1) After 1 s, car X travels 8 m.

(2) In each second, car X has a larger change in velocity.

(3) The velocities of both cars change uniformly.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

New Physics at Work




3 A block of mass 3 kg is initially at rest. A net horizontal force of 24 N acts on the block for the

first 4 s. Then the net force acting on it becomes zero. Which of the following statements is

incorrect?

A During the first 4 s, the acceleration of the block is 8 m s2

.

B After the first 4 s, the velocity of the block increases from 0 to 32 m s

1.

C After the first 4 s, the displacement of the block is 64 m.

D The velocity of the block increases in the first 4 s and then becomes zero.

4

The figure above shows a section of a roller-coaster. When a 1500-kg cart passes A, its speed is

2 m s1

. If the track between A and B is 200 m and the average frictional force along the track is

400 N, what is the kinetic energy of the cart at B?

A 3000 J

B 70 000 J

C 73 000 J

D 150 000 J

New Physics at Work




5

Eurocopter EC155 B1 helicopter has 2 engines and the output power of each engine is 789 kW.

How much energy is output by the helicopter in 1 minute?

A 47.3 kJ

B 94.7 kJ

C 47.3 MJ

D 94.7 MJ

6 Which of the following statements about conduction, convection and radiation is correct?

A Conduction transfers heat from the cold part of an object to the hot part.

B Convection can take place in solid.

C Heat can be transferred through a vacuum by radiation only.

D Dull black surfaces are good absorbers but poor radiators of heat.

New Physics at Work




7 An equal amount of energy is supplied to each of the following liquids. Which liquid will have

the largest rise in temperature?

Liquid Mass / kg Specific heat capacity / J kg1 C

1

A P 1 4200

B Q 2 2300

C R 3 2200

D S 4 900

8

ice

wire gauze

boiling tube

boiling water

Bunsen flame

An experiment is carried out as shown in the figure above. The ice at the bottom of the boiling

tube takes a long time to melt, even though the water at the top of the tube is boiling. Which of

the following statements is/are correct?

(1) At the top of the tube, heat is transferred in water by convection.

(2) The experiment shows that water is a good conductor of heat.

(3) The wire gauze prevents heat from transferring to the ice.

A (1) only

B (1) and (3) only

C (2) and (3) only

D (1), (2) and (3)

New Physics at Work




9

Two liquids P and Q of equal mass are heated by two identical heaters. The above graph shows

the variation of the temperatures of P and Q with time. Which of the following statements is/are

correct?

(1) The specific latent heat of vaporization of P is larger than that of Q.

(2) The boiling point of P is higher than that of Q.

(3) The specific heat capacity of P is larger than that of Q.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

temperature

time 0

P

Q

New Physics at Work




10

melting ice

beaker A

set A

joulemeter

set B

beaker B

power supply

power supply

The above set-up is used to measure the specific latent heat of fusion of ice. When the heater is

switched on, which of the following statements is/are correct?

(1) Crushed ice should be used.

(2) Mass of water collected in beaker A is larger than that in beaker B.

(3) Each of the funnels should be covered with a lid to give a more accurate result.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

New Physics at Work




11

The figure above shows some plane waves produced in a ripple tank. Which of the following

statements about the water waves is/are correct?

(1) They are transverse waves.

(2) Their velocities depend on the depth of water.

(3) Their frequencies depend on the depth of water.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

12

A man stands facing a wall and claps his hands. If the distance between the man and the wall is

500 m, after how long will he hear an echo of his clap?

(Take the speed of sound in the air as 340 m s1

.)

A 0.735 s

B 1.47 s

C 2.94 s

D 5.89 s

wall

a man claps his hand

New Physics at Work




13 Which of the following statements about light is correct?

A Light shows reflection, therefore it is a wave.

B Light shows interference, therefore it is a wave.

C Light always travels at a speed of 3 108 m s

1.

D Light beam from a torch diverges because of diffraction.

14

Blocks X and Y are placed side by side on a table. The figure above shows the refraction of two

parallel light rays on entering the two blocks from air. The refractive indices of X and Y are nX

and nY respectively. Which of the following relationships is correct?

A nX = nY = 1

B nX > nY > 1

C nY > nX > 1

D nX > 1 > nY

15 Which of the following statements about virtual images is correct?

A Virtual images are diminished.

B Virtual images are inverted.

C Virtual images can be formed on a screen.

D Virtual images can be seen by observers.

X Y air

New Physics at Work




16

A student observes a distant object through a lens. Which of the following statements is/are

incorrect?

(1) The image is formed on the lens surface.

(2) The lens is a convex lens.

(3) The image distance is equal to the focal length of the lens.

A (1) only

B (3) only

C (1) and (3) only

D (2) and (3) only

17 Which of the following ray diagrams concerning the refraction of light ray by a diverging lens

is/are correct? F denotes the focus of the lens.

(1)

(2)

(3)

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

New Physics at Work




18

The figure above shows a simple circuit. The resistance of bulb X is greater than that of bulb Y.

Which of the following statements about the circuit is/are correct?

(1) Charges flow slower in bulb X than in bulb Y.

(2) Light bulbs absorb some charges to glow.

(3) Electric charges deliver energy to light bulbs.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

19 A metal wire of length l and cross-sectional area A has a resistance of 10 . If another wire of

the same metal is 2l in length and has a cross-sectional area of 0.5A, what is its resistance?

A 5

B 10

C 20

D 40

A

bulb X

bulb Y

V

New Physics at Work




20

Two bulbs X and Y are of ratings ‘110 V, 40 W’ and ‘110 V, 60 W’ respectively. Which of the

following statements about the bulbs is incorrect?

A The resistance of X is greater than that of Y.

B When they are connected in series to a 220 V mains supply, they work at their rated

values.

C When they are connected in series to a 220 V mains supply, X is brighter than Y.

D When they are connected in parallel to a 220 V mains supply, Y is brighter than X.

21

The figure above shows the path of a negative charge moving in the magnetic field of region

PQRS. What is the direction of the magnetic field in PQRS?

A to the right

B to the left

C into paper

D out of paper

Q

R S

P

New Physics at Work




22

The figure above shows a simple d.c. generator. Which of the following statements about the

generator is/are correct?

(1) The current always flows from A to B during the rotation of the coil.

(2) The coil rotates in the clockwise direction in the observer’s view.

(3) If a curved pole magnet is used, the coil can run more smoothly.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

observer

carbon brush

commutator

magnet pole

coil pivot

N

A

current

S

B

C

D

New Physics at Work




23

The figure above shows the cross-sections of three parallel straight wires X, Y and Z. X and Y

carry currents flowing out of the paper and Z carries a current flowing into the paper. Y is

equidistant from X and Z. The three wires carry currents of equal size. What is the direction of

the resultant force acting on X?

A towards the left

B towards the right

C upwards

D downwards

24 92

235U undergoes a series of decay processes to form to 82

207Pb . How many particles and

particles have been emitted in this process?

A 7 4

B 7 10

C 28 4

D 28 10

upwards

right left

downwards X Y Z

New Physics at Work




25 The activity of a radioactive isotope drops to 16

1 of its initial value in an hour. Find the half-life

of the isotope.

A 7.5 minutes

B 10 minutes

C 15 minutes

D 20 minutes

Directions: Each question below (questions 2627) consists of two statements. Decide whether each

of the two statements is true or false. If both are true, then decide whether or not the

second statement is a correct explanation of the first statement. Then select one option A,

B, C or D according to the following table:

1st statement 2nd statement

A. True True 2nd statement is a correct explanation of the

1st statement

B. True True 2nd statement is not a correct explanation of

the 1st statement

C. True False

D. False True


26 Water vapour can condense on a cold

surface.

Latent heat of vaporization is released to the

cold surface when water vapour condenses.

27 If an object closed to a spark counter makes

no spark, it is not radioactive.

Spark counters cannot detect radiation with

low ionizing power, e.g. radiation.

New Physics at Work




Section B

28 A man walks from A to B at a speed 2 m s1

and returns along the same road at 3 m s1

. The

distance between A and B is 12 m. What is his average speed for the whole trip?

A 1.2 m s1

B 2.4 m s1

C 2.5 m s1

D 6 m s1

29 A car is moving in the negative direction. What would happen if the car is moving under

acceleration which also points in the negative direction?

A Its speed will increase.

B Its speed will decrease.

C The car will stop immediately.

D The car will move at a constant velocity.

30

A ball is put on a smooth table and it is pulled by two forces, one towards north and the other

towards east. The plane of the forces and the table surface are horizontal. In order to keep the

ball moving towards east at a constant velocity, an additional force is required. Find the

magnitude of the additional force.

A 5 N

B 13 N

C 17 N

D 60 N

F1 = 5 N

F2 = 12 N

N

New Physics at Work




31

The figure above shows the motion of two balls before and after collision. Note that the ground

is smooth and ball B is at rest before collision. Which of the following statements about the

collision must be correct?

(1) The total kinetic energy of the balls is conserved.

(2) The total momentum of the balls is conserved.

(3) The size of the force of impact acting on B by A is equal to that acting on A by B.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

32 0.3 kg of water is heated up by an immersion heater for 1.5 minutes. It is found that the power

of the heater is 500 W and 1200 J of energy is lost to the surroundings. Find the temperature

change of the water.

(Given: Specific heat capacity of water = 4200 J kg1

C–1

.)

A 34.3 C

B 34.8 C

C 35.7 C

D 36.7 C

A B A B

New Physics at Work




33 Which of the following statements about an air convection current is/are correct?

(1) The temperatures of air along the convection current are different.

(2) The densities of air along the convection current are different.

(3) The internal energy of air along the convection current is the same.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

34

An electric heater is used to heat a solid. The temperature-time graph of the substance is shown

above. Which of the following statements is/are correct from 100 s to 500 s?

(1) Both solid and liquid exist.

(2) The potential energy of the particles increases.

(3) There is no energy gain by the substance.

A (1) only

B (3) only

C (1) and (2) only

D (1) and (3) only

temperature

time / s 600 0 200 400

New Physics at Work




35

Two dippers A and B vibrate in phase producing identical circular water waves in a ripple tank.

The figure above shows a wave pattern at a certain instant. Which of the following statements

is correct?

A The wavelength of the water waves is 3 cm.

B P will become a point of destructive interference half a period later.

C P will become a point of destructive interference if the frequency of the dippers is

doubled.

D A big crest is formed at P at the instant shown.

36

In the figure above, a plane wave travels towards a double-slit and circular waves come out

from the slits. P is 15 cm away from S1 and 20 cm away from S2. Q is 14 cm away from S1 and

12 cm away from S2. If the wavelength of the wave is 2 cm, what types of interference will

occur at P and Q respectively?

P Q

A Constructive interference Constructive interference

B Constructive interference Destructive interference

C Destructive interference Constructive interference

D Destructive interference Destructive interference

6 cm

A B

P

New Physics at Work




37 Which of the following statements about sound intensity level is/are correct?

(1) Sound intensity level is measured in decibels (dB).

(2) If the sound intensity level is 0 dB, there is no sound.

(3) Sound louder than 140 dB causes permanent damage to our ears. But one will not suffer

from loss of hearing if one is continually exposed to sound of 90 dB.

A (1) only

B (3) only

C (1) and (2) only

D (2) and (3) only

38

Two insulated uncharged metal spheres X and Y are placed in contact and another insulated

uncharged metal sphere Z is put near them. What are the net charges on X, Y and Z when a

positively charged rod is brought near X?

X Y Z

A positive negative negative

B negative negative neutral

C negative positive negative

D negative positive neutral

X Y Z

+ +

+ +

+

New Physics at Work




39

The figure above shows a d.c. generator connected to a load. The coil ABCD connects to a

commutator and a pair of carbon brushes X and Y. Which of the following statements is/are

correct?

(1) Induced current is driven from A to B in wire AB.

(2) Carbon brush X can be regarded as a positive terminal of a d.c. source.

(3) The induced voltage of the generator can be increased by reducing the resistance of the

load.

A (1) only

B (2) only

C (1) and (3) only

D (2) and (3) only

X Y

coil

load

N S A

B

D

C

New Physics at Work




40

If switch S in the above circuit is closed, what happens to the electrical power in the circuit?

A It will be increased by 2 W.

B It will be increased by 3 W.

C It will be increased by 9 W.

D It will be increased by 18 W.

41

In Figure 1, a galvanometer deflects to the right with a reading of 10 A. The north pole of the

same magnet is now pushed towards the same coil from the other side at a faster rate as shown

in Figure 2. Which of the following statements is correct?

A The deflection on the galvanometer will be less than 10 A to the left.

B The deflection on the galvanometer will be more than 10 A to the left.

C The deflection on the galvanometer will be less than 10 A to the right.

D The deflection on the galvanometer will be more than 10 A to the right.

6 V

S

9 3

N N S S

direction of

motion

coil

Fig 1 Fig 2

New Physics at Work




42

Two identical bulbs P and Q are connected to an ideal transformer as shown. Which of the

following statements is correct when switch S is closed?

A The brightness of bulb P decreases.

B Output power of the transformer increases.

C The primary voltage of the transformer increases.

D The reading of the ammeter remains unchanged.

43 A radioactive source is placed in front of a G-M tube connected to a counter. Various absorbers

are placed between the source and the G-M tube and the count rates are recorded. The following

results are obtained:

Absorber Counts per minute

no absorber 711

a sheet of paper 508

5-mm aluminium 493

25-mm lead 218

From these results, what type(s) of radiation does the source emit?

A and radiation only

B and radiation only

C radiation only

D radiation only

New Physics at Work




Directions: Each question below (questions 4445) consists of two statements. Decide whether each

of the two statements is true or false. If both are true, then decide whether or not the

second statement is a correct explanation of the first statement. Then select one option A,

B, C or D according to the following table:


A. True True 2nd statement is a correct explanation of the

1st statement

B. True True 2nd statement is not a correct explanation of

the 1st statement

C. True False

D. False True


44 A concave lens is a diverging lens. Images formed by a concave lens can be real.

45 Ammeter usually has very low resistance. The current in a circuit should not be

noticeably affected when an ammeter is

connected in series with the circuit.

END OF PAPER

New Physics at Work




Useful Formulae in Physics

(a) Relationships between initial velocity u, uniform acceleration a, final velocity v and

displacement travelled s after time t :

v u at

2

2

1atuts

asuv 222

(b) Potential energy gained by a body of mass m when raised through a height h is mgh.

(c) Kinetic energy of a body of mass m moving with speed v is 2

2

1mv .

(d) Power = force velocity

(e) Equivalent resistance of two resistors R1 and R2 :

(i) in series R1 R2

(ii) in parallel 21

21

RR

RR

(f) Power = potential difference current

New Physics at Work




Physics Mock Exam Paper 2

Question No. Key Question No. Key

1 B 26 A

2 D 27 D

3 D 28 B

4 C 29 A

5 D 30 B

6 C 31 D

7 D 32 B

8 A 33 C

9 D 34 C

10 C 35 D

11 C 36 C

12 C 37 A

13 B 38 D

14 B 39 A

15 D 40 C

16 A 41 D

17 D 42 B

18 B 43 A

19 D 44 C

20 B 45 A

21 D

22 B

23 B

24 A

25 C

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