Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2009 Winter Zone 1

A stopwatch is used to time an athlete running 100 m. The timekeeper forgets to reset the watch to zero before using it to time another athlete running 100 m.

[Image_1: Stopwatch at end of first athlete's run showing 45 seconds]
[Image_2: Stopwatch at end of second athlete's run showing 56 seconds]

How long does the second athlete take to run 100 m?

A 11.2 s
B 11.4 s
C 12.4 s
D 23.8 s

A ball is thrown upwards.
What effect does the force of gravity have on the ball?
A. It produces a constant acceleration downwards.
B. It produces a constant acceleration upwards.
C. It produces a decreasing acceleration upwards.
D. It produces an increasing acceleration downwards.

A car accelerates from traffic lights. The graph shows the car’s speed plotted against time. How far does the car travel before it reaches a constant speed? A 10 m B 20 m C 100 m D 200 m

Which property of a body can be measured in newtons?
A density
B mass
C volume
D weight

A cup contains hot liquid.
Some of the liquid evaporates as it cools.
What happens to the mass and to the weight of the liquid in the cup as it cools?

[Table:
mass | weight
A | decreases | decreases
B | decreases | stays the same
C | stays the same | decreases
D | stays the same | stays the same ]

The diagrams show a rectangular box with inside measurements of 5 cm × 6 cm × 4 cm.

The box has a mass of 40 g when empty. When filled with a liquid, it has a total mass of 220 g.
What is the density of the liquid?
A \(\frac{220}{5 \times 6 \times 4}\) g/cm\(^3\)
B \(\frac{220 - 40}{5 \times 6 \times 4}\) g/cm\(^3\)
C \(\frac{5 \times 6 \times 4}{220}\) g/cm\(^3\)
D \(\frac{5 \times 6 \times 4}{220 - 40}\) g/cm\(^3\)

Passengers are not allowed to stand on the upper deck of double-decker buses.

Why is this?
A They would cause the bus to become unstable.
B They would cause the bus to slow down.
C They would increase the kinetic energy of the bus.
D They would lower the centre of mass of the bus.

The object in the diagram is acted upon by the two forces shown.

What is the effect of these forces?
A. The object moves to the left with constant speed.
B. The object moves to the left with constant acceleration.
C. The object moves to the right with constant speed.
D. The object moves to the right with constant acceleration.

The diagram shows a microphone being used in an interview.

Which energy change takes place in the microphone?
[Table_1]
| | input energy | output energy | |---|--------------|---------------| | A | chemical | electrical | | B | electrical | chemical | | C | electrical | sound | | D | sound | electrical |

The table shows the times taken for four children to run up a set of stairs. Which child's power is greatest?
[Table_1: mass of child / kg and time / s]
| | mass of child / kg | time / s |
|---|------------------|---------|
| A | 40 | 10 |
| B | 40 | 20 |
| C | 60 | 10 |
| D | 60 | 20 |

A water manometer is used to measure the pressure of a gas supply to a house. It gives a reading of $h$ cm of water.

Why is it better to use water rather than mercury in this manometer?
A $h$ would be too large if mercury were used.
B $h$ would be too small if mercury were used.
C The tube would need to be narrower if mercury were used.
D The tube would need to be wider if mercury were used.

The diagrams show two swimming pools. One contains fresh water and the other contains salt water. Salt water is more dense than fresh water.
At which labelled point is the pressure the greatest?
[Image_1: Two diagrams, one with label A and B for fresh water, and another with label C and D for salt water.]

Brownian motion is observed by looking at smoke particles through a microscope.
How do the smoke particles move in Brownian motion?
A all in the same direction
B at random
C in circles
D vibrating about fixed points

A small amount of air is introduced into the vacuum above the mercury in a mercury barometer tube.
The mercury level goes down.
Why does the mercury level go down?
A The air molecules cool the mercury and make it contract.
B The air molecules decrease the pressure above the mercury.
C The air molecules heat the mercury and make it expand.
D The air molecules increase the pressure above the mercury.

To mark a temperature scale on a thermometer, standard temperatures known as fixed points are needed.
Which of these is a fixed point?
A. room temperature
B. the temperature inside a freezer
C. the temperature of pure melting ice
D. the temperature of pure warm water

The table gives the melting points and boiling points of glycerine and benzene.

[Table_1]

At which temperature will both glycerine and benzene be liquid?
A 0°C
B 50°C
C 100°C
D 150°C

A beaker contains water at room temperature. How could a convection current be set up in the water?
A cool the water at X
B cool the water at Y
C stir the water at X
D stir the water at Y

A student warms her hands near a fire.
Which waves carry most heat to her hands and are these waves electromagnetic?
[Table_1:
| waves | electromagnetic |
|------------|-----------------|
| A. infra-red | no |
| B. infra-red | yes |
| C. visible light | no |
| D. visible light | yes |]

The drawing shows a wave.
Which labelled distance is the wavelength?

Sound waves travel from a point X to another point Y. Which diagram represents the movement of the air molecules, caused by the sound waves, in the region between X and Y. A [Image - Arrow going up and down] B [Image - Arrow going left and right] C [Image - Circular arrow] D [Image - Line with points X and Y]

A ray of light in glass is incident on a boundary with air. Which path does the ray of light take when the angle of incidence $i$ is less than the critical angle?

An object O is placed in front of a converging lens of focal length $f$. At which point will the top of the image be seen?

Which range of frequencies typically can be heard by a 10 year-old child?
A 20Hz – 2000Hz
B 20Hz – 20000Hz
C 200Hz – 2000Hz
D 200Hz – 20000Hz

Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in space.
Compared with the sound heard if they were working on Earth, what does astronaut 2 hear?
A. a louder sound
B. a quieter sound
C. a sound of the same loudness
D. no sound at all

A permanent magnet is brought near to a piece of copper. The copper is not attracted by the magnet.
Why is there no attraction?
A Copper is ferrous but is only attracted by an electromagnet.
B Copper is ferrous but is not attracted by any type of magnet.
C Copper is not ferrous and is only attracted by an electromagnet.
D Copper is not ferrous and is not attracted by any type of magnet.

Four plotting compasses are placed in the magnetic field of two identical bar magnets as shown in the diagram.

Which compass is shown pointing in the wrong direction?

A pupil measures the potential difference across a device and the current in it.
Which calculation gives the resistance of the device?
A current + potential difference
B current ÷ potential difference
C potential difference ÷ current
D potential difference × current

A student uses a length of wire as a resistor. He discovers that the resistance of the wire is too small.
To be certain of making a resistor of higher value, he should use a piece of wire that is
A longer and thicker.
B longer and thinner.
C shorter and thicker.
D shorter and thinner.

The diagram shows a battery connected to two identical resistors. Three ammeters \(M_1, M_2\) and \(M_3\) are connected in the circuit.



Meter \(M_1\) reads 1.0A.

What are the readings on \(M_2\) and on \(M_3\)?

[Table_1]

\[\begin{array}{|c|c|c|} \hline & \text{reading on } M_2/A & \text{reading on } M_3/A \\ \hline A & 0.5 & 0.0 \\ B & 0.5 & 0.5 \\ C & 0.5 & 1.0 \\ D & 1.0 & 1.0 \\ \hline \end{array}\]

The diagram shows a torch containing two cells, a switch and a lamp. [Image: Diagram of torch with labeled parts: plastic case, brass connecting strip, switch, lamp]
What is the circuit diagram for the torch?
A [Image: Circuit A] B [Image: Circuit B] C [Image: Circuit C] D [Image: Circuit D]

An electrical component X is placed in water, as shown.

When the temperature of the water is increased, the reading on the ammeter increases. What is component X?
A. a capacitor
B. a light-dependent resistor
C. a relay
D. a thermistor

A certain electrical appliance is powered from a mains supply. The appliance normally uses a current of 3 A, but the current briefly rises to 4 A at the instant the appliance is switched on. The cable to the appliance is designed for currents up to 6 A.

The fuses available to protect the cable are rated at 1 A, 3 A, 5 A and 13 A.

Which fuse should be used?

\( \text{A 1 A} \) \( \text{B 3 A} \) \( \text{C 5 A} \) \( \text{D 13 A} \)

On a building site, metal scaffolding is firmly embedded in the damp ground. A builder holds a mains-operated electric drill in one hand. With his other hand he holds on to the scaffolding.

The power cable of the drill is damaged where it enters the metal casing of the drill.

What danger does this present to the builder?
A A current could pass through the builder and electrocute him.
B A current in the scaffolding could heat it up and burn him.
C The large current could blow the fuse and damage the drill.
D The large current could make the motor spin too quickly.

Which device is designed to allow a small direct current (d.c.) to control a large direct current (d.c.)?
A. a generator
B. a motor
C. a relay
D. a transformer

A transformer is to be used to provide a 10 V output from a 100 V supply.



What are suitable numbers of turns for the primary coil and for the secondary coil?

[Table_1]
number of turns on the primary coil | number of turns on the secondary coil
A | 100 | 1000
B | 200 | 110
C | 400 | 490
D | 800 | 80

The diagram shows a beam of cathode rays entering an electric field.

In which direction is the beam deflected by the field?
A downward
B upward
C into the page
D out of the page

To create cathode rays in a vacuum, what might be a suitable potential difference to connect between the cathode and anode?
A. 6V a.c.
B. 6V d.c.
C. 600V a.c.
D. 600V d.c.

Which statement explains the meaning of the half-life of a radioactive substance?
A half the time taken for half the substance to decay
B half the time taken for the substance to decay completely
C the time taken for half the substance to decay
D the time taken for the substance to decay completely

The diagram shows the paths of three different types of radiation, X, Y and Z.

Which row in the table correctly identifies X, Y and Z?
[Table_1]

How many neutrons and how many protons are contained in a nucleus of $^{238}_{92}\text{U}$?

[Table_1]

neutrons | protons
A | 92 | 146
B | 146 | 92
C | 146 | 238
D | 238 | 92