Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2015 Winter Zone 1

Which option contains only apparatus that could be used to determine the volume of a small block of unknown material?
A. measuring cylinder, metre rule
B. measuring cylinder, stopwatch
C. metre rule, balance
D. metre rule, stopwatch

The graph represents the motion of a car.
What is the distance travelled by the car while it is moving at a constant speed?
A 100 m
B 150 m
C 250 m
D 300 m

A car travels along the route PQRST in 30 minutes. What is the average speed of the car?
A 10 km/hour
B 20 km/hour
C 30 km/hour
D 60 km/hour

The mass of an object is measured on Earth. The mass is 5.0 kg.
The object is taken to the Moon. The mass of the object is measured on the Moon.
What is the mass of the object on the Moon?
A) 0 kg
B) more than 0 kg, but less than 5.0 kg
C) 5.0 kg
D) more than 5.0 kg

A student wishes to determine the density of the solid block shown.
Which quantities must be known?
A the area of the shaded face and the volume of the block
B the area of the shaded face and the weight of the block
C the mass of the block and the height of the block
D the mass of the block and the volume of the block

A heavy beam rests on two supports. The diagram shows the only three forces $F_1$, $F_2$ and $F_3$ acting on the beam.



The beam is in equilibrium. Which statement is correct?
A. All the forces are equal in size.
B. The resultant force on the beam is in the opposite direction to the resultant turning effect.
C. The resultant force on the beam is zero and the resultant turning effect on the beam is zero.
D. The total upward force is twice the total downward force.

Which list contains only properties of an object that can be changed by a force?
A. direction of motion, mass, shape
B. direction of motion, mass, speed
C. direction of motion, shape, speed
D. mass, shape, speed

What needs to be known to calculate the work done by a force acting on an object?
[Table_1]

Electrical energy may be obtained from nuclear fission.
In which order is the energy transferred in this process?
A nuclear fuel → generator → reactor and boiler → turbines
B nuclear fuel → generator → turbines → reactor and boiler
C nuclear fuel → reactor and boiler → generator → turbines
D nuclear fuel → reactor and boiler → turbines → generator

The diagram shows a manometer containing a liquid. The manometer is used to find the difference between the pressure of a gas and atmospheric pressure.
Which distance represents this pressure difference?

Four physics teachers investigate pressure. They wear identical clothes and lie on different beds of nails.
The table gives the weight of each teacher and the total area of contact between the teacher and the nails.
Which teacher experiences the least pressure from the nails?

[Table_1]

A cylinder of constant volume contains a fixed mass of gas. The gas is cooled.

What happens to the pressure of the gas and what happens to the kinetic energy of the gas molecules?

[Table_1]

pressure of gas | kinetic energy of molecules
A | decreases | decreases
B | decreases | increases
C | increases | decreases
D | increases | increases

A swimmer feels cold after leaving warm water on a warm, windy day.
Why does she feel cold even though the air is warm?
A. The less energetic water molecules on her skin escape quickly.
B. The more energetic water molecules on her skin do not escape quickly.
C. The water on her skin does not evaporate quickly enough to keep her warm.
D. The water on her skin evaporates quickly and cools her skin.

A circular metal disc is heated.
Which quantity decreases?
A. its density
B. its diameter
C. its thickness
D. its volume

The same quantity of thermal (heat) energy is given to two objects X and Y. The temperature rise of object X is less than the temperature rise of object Y.
What accounts for this difference?
A. X has a larger thermal capacity than Y.
B. X is a better thermal conductor than Y.
C. Y has a larger thermal capacity than X.
D. Y is a better thermal conductor than X.

The air in a room is heated by a heater. The diagram shows the circulation of the air in the room.
Which statement about the air that is heated is correct?
A. The air contracts and becomes less dense.
B. The air contracts and becomes more dense.
C. The air expands and becomes less dense.
D. The air expands and becomes more dense.

Four rods are made from different metals P, Q, R and S. The rods have equal lengths and equal diameters. The rods are heated at one end, in the same way.
The table shows the time taken for the temperature at the other end of each rod to rise by 1.0°C.
Which metal is the best conductor of thermal energy (heat)?
[Table_1: metal - P: 35 s, Q: 30 s, R: 45 s, S: 40 s]
A. metal P
B. metal Q
C. metal R
D. metal S

The diagram shows a side view of a water wave at a particular time. The diagram is drawn full size.

Which statement about the wave is correct?
A. The wave is longitudinal and the frequency can be measured from the diagram.
B. The wave is longitudinal and the wavelength can be measured from the diagram.
C. The wave is transverse and the frequency can be measured from the diagram.
D. The wave is transverse and the wavelength can be measured from the diagram.

The diagram shows a water wave approaching a barrier with a gap.
The wave reaches point P.
What is the name of the effect that causes the wave to reach point P?
A diffraction
B dispersion
C reflection
D refraction

The diagram represents the electromagnetic spectrum.
Some regions have been labelled, and some labels are missing.
Which region should be labelled as infra-red waves?
[Table_1]

A student draws a diagram representing three rays of light from point P passing through a converging lens. Each point labelled F is a principal focus of the lens.

Which of the rays has the student drawn correctly?
A ray X and ray Y
B ray X and ray Z
C ray Y only
D ray Z only

The diagram shows a ray of light inside a glass rod. The critical angle for the light in the glass is 42°.

Which row shows what happens to the light when it reaches the surface of the glass rod?
[Table_1]

Which row states whether light waves and whether sound waves can travel in a vacuum?
[Table_1: sound waves, light waves]
A no no
B no yes
C yes no
D yes yes

Sounds are produced by vibrating objects. A certain object vibrates but a person nearby cannot hear any sound.
Which statement could explain why nothing is heard?
A The amplitude of the sound waves is too large.
B The frequency of the vibration is too high.
C The sound waves are transverse.
D The speed of the sound waves is too high.

Which row states whether each metal is ferrous or non-ferrous?
[Table_1:
\begin{array}{|c|c|c|c|} \hline & \text{ferrous} & \text{non-ferrous} \\ \hline A & \text{aluminium} & \text{copper} \\ \hline B & \text{copper} & \text{iron} \\ \hline C & \text{iron} & \text{steel} \\ \hline D & \text{steel} & \text{aluminium} \\ \hline \end{array}]

Which procedure may be used to demagnetise a steel bar?
A cooling it in a freezer for several hours
B earthing it with a copper wire for several seconds
C removing it slowly from a coil carrying an alternating current (a.c.)
D rubbing it in one direction with a woollen cloth

What is the unit of electrical power?
A. ampere
B. joule
C. volt
D. watt

Some resistors are made using one type of wire. Two different lengths of wire are available. Each length is available in two different diameters.

Which wire has the highest resistance?
A. the wire with the greater length and the larger diameter
B. the wire with the greater length and the smaller diameter
C. the wire with the smaller length and the larger diameter
D. the wire with the smaller length and the smaller diameter

Four students are each given an identical resistor and asked to find its resistance. They each measure the potential difference across the resistor and the current in it.

One student makes a mistake.

Which row shows the results of the student that makes a mistake?

[Table_1]

| potential difference /V | current /A |
|-------------------------|------------|
| A | 1.2 | 0.500 |
| B | 2.4 | 1.100 |
| C | 1.5 | 0.625 |
| D | 3.0 | 1.250 |

What is the circuit symbol for a variable resistor?
A: [Image_A]
B: [Image_B]
C: [Image_C]
D: [Image_D]

The diagram shows a circuit containing three ammeters P, Q and R.
Which statement about the readings on the ammeters is correct?
A The reading on P is equal to the reading on Q.
B The reading on P is equal to the reading on R.
C The reading on Q is greater than the reading on P.
D The reading on Q is greater than the reading on R.

The diagram shows a light-dependent resistor (LDR) connected in a potential divider circuit.
The brightness of the light falling on the LDR is increased.
Which row shows what happens to the resistance of the LDR, and what happens to the reading on the voltmeter?

Four lamps are each labelled '60 W 230 V'.
In which circuit are the lamps connected so that they operate at normal brightness?

A step-up transformer is used before electricity is transmitted by overhead cables.
Which statement explains why the step-up transformer is used?
A. It increases the current to increase the speed at which the electricity travels.
B. It increases the current to reduce energy loss in the cables.
C. It increases the voltage to increase the speed at which the electricity travels.
D. It increases the voltage to reduce energy loss in the cables.

A current-carrying wire XY lies in the magnetic field between the two poles of a U-shaped electromagnet. A force acts on the wire XY because of the magnetic field.

Each of the following actions is carried out separately.
• The current in the wire XY is reversed.
• The magnetic field is reversed.
• Both the current in the wire XY and the magnetic field are reversed at the same time.
How many of these actions cause the direction of the force on the wire XY to be reversed?
A 0   B 1   C 2   D 3

A current-carrying coil in a magnetic field experiences a turning effect.
How can the turning effect be increased?
A. Increase the number of turns on the coil.
B. Reduce the size of the current.
C. Reverse the direction of the magnetic field.
D. Use thinner wire for the coil.

The diagram shows cathode rays entering an electric field between two charged plates.

How does the path of the cathode rays change and why?
A They move towards the negative plate because cathode rays have a negative charge.
B They move towards the negative plate because cathode rays have a positive charge.
C They move towards the positive plate because cathode rays have a negative charge.
D They move towards the positive plate because cathode rays have a positive charge.

The nuclide symbol for radioactive polonium is $^{210}_{84}\text{Po}$.
A nucleus of this type of polonium emits an $\alpha$-particle.
What is the proton number (atomic number) of the nucleus after it has emitted the $\alpha$-particle?
A 82 B 83 C 84 D 85

A student investigates how the radiation from a radioactive source changes with time.
The table shows the results from the detector used by the student.

[Table_1]

The experiment is repeated by many other students, who also measure the count rate every two minutes.
The half-life of the source is known to be exactly 2.0 minutes.

Why is the measured count rate always greater than half the previous value?
A Radioactive emissions occur randomly with time.
B The detector used is very close to the source.
C There is background radiation present.
D The radioactive source is decaying.

The nuclide notation for radium-226 is $^{226}_{88} ext{Ra}$.
How many electrons orbit the nucleus of a neutral atom of radium-226?
A 0 B 88 C 138 D 226