Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2016 Winter Zone 3

The graph shows how the distance travelled by a vehicle changes with time.

Which row describes the speed of the vehicle in each section of the graph?

A stone falls freely from the top of a cliff. Air resistance may be ignored.
Which graph shows how the acceleration of the stone varies with time as it falls?

The speed-time graph for an object is shown.

Below are four statements about the acceleration of the object.
Which statement is true?

An astronaut on the Moon weighs less than on Earth. What is the reason for this difference, and how does his mass on the Moon compare with his mass on Earth? [Table_1]

The diagrams show an empty container, and the same container filled with liquid.

The empty container has a mass of 120 g. When filled with the liquid, the total mass of the container and the liquid is 600 g.



The volume of liquid in the container is 600 cm³.

What is the density of the liquid?

An object travels in a circular path at constant speed. Which statement about the object is correct?

Different loads are hung on a spring. The diagram shows the length of the spring with and without the loads attached.
What is the extension of the spring when the load is 400N?

A vehicle of mass 900 kg is travelling with a velocity of 20 m/s.
What is the momentum of the vehicle?

Which list contains only scalar quantities?

A ball is dropped onto a floor. Its speed just before hitting the floor is 3.0 m/s. Which change would result in a speed of 6.0 m/s just before hitting the floor? Ignore any effects due to air resistance.

Which list contains only energy resources that derive their energy from the Sun?

A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings.
What is the efficiency of the lamp?

A container is filled with liquid to a certain depth $h$.
The pressure of the liquid at the bottom of the container depends on several factors.
Which is one factor on which the pressure does not depend?

Which diagram best represents the movement of a smoke particle displaying Brownian motion?

The volume of a gas is measured at different pressures.
The pressure $p$ and the volume $V$ of the gas are found to be related by the equation: $pV = ext{constant}$.
Which quantities are kept constant and which quantities change?
[Table_1]

A piece of melting ice at 0°C and a beaker of boiling water are both in a laboratory. The laboratory is at 20°C.

What is happening to the temperature of the melting ice and what is happening to the temperature of the boiling water?

A scientist has two thermometers available: a liquid-in-glass thermometer and a thermocouple thermometer.
Which thermometer is better for measuring a very high temperature, and which thermometer is better for measuring a rapidly varying temperature?
[Table_1]

A copper container of mass 0.20 kg contains 0.10 kg of water.
The specific heat capacity of copper is 385 J/(kg°C) and the specific heat capacity of water is 4200 J/(kg°C).
How much energy, in joules, is needed to raise the temperature of the copper container and the water by 10°C?

The diagrams show four spherical objects of the same size. Two of the objects are white and two are black. Two of the objects are at the same high temperature and two are at the same low temperature.
Which object emits infra-red radiation at the greatest rate?

A man is talking at the side of a house. He can be heard by a woman at the front of the house even though she cannot see him.

What is the explanation for this?

An image is formed by a plane mirror. A second image is formed by a lens used as a magnifying glass.
Which row states the nature of each of these images?
[Table]

The speed of light in air is $3.0 \times 10^{8} \text{ m/s}$.
The critical angle for light in a transparent plastic material placed in air is $37^{\circ}$.
What is the speed of light in the plastic material?

Which description applies to infra-red radiation?

A girl notices that, when she shouts into a cave, she hears an echo.
Which wave property causes the echo?

A man stands 110 m from a high wall. He makes a short, sharp sound and then hears an echo from the wall.
The speed of sound in air is 330 m/s.
How long after making the sound does the man hear the echo?

A student suggests three methods for demagnetising a piece of steel.
1 placing it in an east-west direction and hammering it hard
2 placing it in an east-west direction and heating it until red hot
3 removing it slowly from a coil carrying alternating current
Which of the methods will demagnetise the piece of steel?

In two separate experiments, a magnet is brought near to an unmagnetised iron bar. This causes the bar to become magnetised.



Which magnetic pole is induced at X and at Y?

A student holds a rod in his hand.
He rubs the rod with a cloth. The rod gains a positive charge.
Of which material could the rod be made, and which transfer of charge has happened?
[Table_1]

The diagram shows a lamp in a circuit.
Which change to the circuit would increase the current in the lamp?

The graph shows the relationship between the current in a circuit component and the potential difference (p.d.) across it. The graph has a straight section and a curved section.

What happens to the resistance of the component in these two sections as the current increases?

In the circuit shown there is a current of 10A.
How much charge passes through the resistor in 2.0 minutes?

The four circuits shown each contain four diodes. In which circuit is the direction of the current in the resistor always from the red terminal to the black terminal?

The diagram shows a potential divider.
When brighter light falls on the light-dependent resistor (LDR), its resistance changes.
What happens to the resistance of the LDR and what happens to the current in it?

The diagram shows two logic gates connected together.
The two inputs are both low (0).
What are the logic states at P and at Q?

Two electrical appliances are connected to the mains supply. The cable connected to one appliance includes an earth wire. The cable connected to the second appliance does not need an earth wire. What is a reason for this difference?

An electric current can produce a heating effect and a magnetic effect.
Which row shows the effect that a relay uses and one application of a relay?
[Table_1]

Which particle is absorbed by a nucleus to cause nuclear fission?

An $\alpha$-particle enters a uniform magnetic field directed out of the page.
In which direction is the $\alpha$-particle deflected by the field?

Radioactive source S emits $\alpha$-particles, $\beta$-particles and $\gamma$-rays. A detector is placed 5cm away from S. A thin sheet of paper is placed as shown in the diagram.
Which emissions from the source can be detected?

Uranium-238 is radioactive and decays to thorium-234 by the emission of a particle.
$$^{238}_{92} \text{U} \rightarrow ^{234}_{90} \text{Th} + \text{particle}$$
Which particle is emitted in this process?