Question 1

Which statement contains an error in the unit?

Accepted Answer

The weight of a rock is 5.4 kg.

Answer

The width of a room is 5.4 m.

Answer

The temperature of water in a beaker is 298 K.

Answer

The work done to lift a bucket is 5.4 J.

Question 2

Which row gives the correct order of magnitude for the size of the objects shown?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 3

A ruler is placed vertically on a bench to measure the height of an arrow above the bench.

Accepted Answer

C

Answer

D

Answer

A

Answer

B

Question 4

Bats sense the distance to surrounding objects by emitting high frequency sound and detecting the sound reflected back from the objects.

The time between emitting a sound and detecting the sound reflected back from a wall is 0.020 s.

How far is the wall from the bat?

(The speed of sound in air is 340m/s.)

Accepted Answer

3.4 m

Answer

13.6 m

Answer

6.8 m

Answer

17 m

Question 5

Which expression describes the mass of the human body?

Accepted Answer

the amount of matter in the human body

Answer

the weight of the molecules in the human body

Answer

the density of the matter in the human body

Answer

the number of molecules in the human body

Question 6

A student wants to calculate a pressure in pascal; 1 pascal (Pa) = 1 N/m² . He calculates the answer using a force given in N and an area given in mm² .

What is the correct unit for his answer?

Accepted Answer

MPa

Answer

mPa

Answer

kPa

Answer

GPa

Question 7

A car moves along a road at constant speed.

Accepted Answer

It is equal and opposite to the forward thrust.

Answer

It increases as the car moves further along the road.

Answer

It decreases as the car moves further along the road.

Answer

It is greater than the forward thrust.

Question 8

The diagram shows all the forces acting on a firework of mass 0.20 kg when it is launched vertically from the surface of the Earth.

Accepted Answer

40m/s2

Answer

60m/s2

Answer

6.0m/s2

Answer

4.0m/s2

Question 9

A man pushes a box across a horizontal floor with a constant horizontal force of 20 N. It takes 12 s to move the box 25 m. Friction can be assumed to be negligible.

What is the power transferred by the man to push the box?

Accepted Answer

42W

Answer

6000W

Answer

9.6W

Answer

15W

Question 10

Which statement describes the particles in a solid?

Accepted Answer

They are close together and vibrating.

Answer

They are far apart and stationary.

Answer

They are close together and stationary.

Answer

They are far apart and vibrating.

Question 11

Ice at 0°C is placed in warm water. The ice melts.

Which statement is correct?

Accepted Answer

The internal energy of the water decreases.

Answer

The temperature of the ice increases as it melts.

Answer

The temperature of the water increases.

Answer

The internal energy of the ice decreases.

Question 12

The heating element of a metal electric kettle is switched on.

Hands placed near the electric kettle feel warm as thermal energy is transferred from the kettle.

Accepted Answer

convection then conduction then radiation

Answer

convection then radiation then conduction

Answer

conduction then convection then radiation

Answer

conduction then radiation then convection

Question 13

Which row describes sound waves?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 14

Which property is the same for all electromagnetic waves travelling in a vacuum?

Accepted Answer

speed

Answer

amplitude

Answer

wavelength

Answer

frequency

Question 15

Which unit is electric charge measured in?

Accepted Answer

coulomb

Answer

ohm

Answer

volt

Answer

ampere

Question 16

How can the potential difference across a running electric motor be calculated?

Accepted Answer

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Answer

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Answer

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Answer

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Question 17

Diagram 1 shows a mains extension cable of length 3 m. Diagram 2 shows the same mains
extension cable wound on its holder.

Accepted Answer

When the cable is unwound, it loses heat to the surroundings more quickly

Answer

When the cable is wound on the holder, some of the current is lost to the surroundings.

Answer

When the cable is unwound, it has a lower resistance.

Answer

When the cable is wound on the holder, the electrical power transferred is greater.

Question 18

A device is made from two solar cell panels connected in series. The device is used to charge a
battery.

Accepted Answer

24 A

Answer

120 A

Answer

12 A

Answer

60 A

Question 19

A desk lamp should have a 3A fuse fitted, but a 13A fuse has been fitted by mistake.

The lamp is not faulty.

The lamp is switched on.

What happens?

Accepted Answer

The lamp lights normally.

Answer

The lamp draws too much current and the supply cables melt.

Answer

The fuse does not blow but the lamp does not light.

Answer

The fuse blows.

Question 20

A radioactive isotope has a half-life of 4.5 days. A sample of the radioactive isotope is monitored.

Which statement about the sample after 9.0 days is correct?

Accepted Answer

75% of the original sample has decayed.

Answer

The sample is no longer radioactive.

Answer

75% of the original sample remains.

Answer

50% of the original sample has decayed.

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