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

The diagram shows an enlarged drawing of the end of a metre rule. It is being used to measure the length of a small feather.

What is the length of the feather?

An object moves at a constant speed for some time, then begins to accelerate. Which distance-time graph shows this motion?

A heavy object is released near the surface of the Earth and falls freely. Air resistance can be ignored.
Which statement about the acceleration of the object due to gravity is correct?

A cup contains hot liquid.
Some of the liquid evaporates.
What happens to the mass and what happens to the weight of the liquid in the cup?
[Table with 'mass' and 'weight' columns options]

An object moves in a circle at constant speed.
Which statement about the force needed on the object is correct?

A long plank XY lies on the ground. A load of 120 N is placed on it, at a distance of 0.50 m from end X, as shown.
End Y is lifted off the ground. The upward force needed to do this is 65 N.
In the diagram, $W$ is the weight of the plank, acting at its mid-point.
What is the value of $W$?

Which list contains only vector quantities?

A gas molecule strikes the wall of a container. The molecule rebounds with the same speed.

What happens to the kinetic energy and what happens to the momentum of the molecule?

Which energy resource does not derive its energy from the Sun?

The diagram shows the energy used by a modern lamp.
60 W input of electrical power
12 W of useful power output as light
48 W of power wasted in heating surroundings

Which expression gives the efficiency of the lamp?

Three boxes each weigh 100 N. A man lifts all the boxes together from the ground onto a shelf that is 1.5 m above the ground. The man takes 2.0 s to do this.



How much useful power does the man produce to lift the boxes?

A diver under water uses breathing apparatus at a depth where the pressure is $1.25 \times 10^5$ Pa.

A bubble of gas breathed out by the diver has a volume of $20 \text{ cm}^3$ when it is released. The bubble moves upwards to the surface of the water.

At the surface of the water, the atmospheric pressure is $1.00 \times 10^5$ Pa.

The temperature of the water is the same at all depths.

What is the volume of this bubble when it reaches the surface?

The diagram shows a simple mercury barometer.
The atmospheric pressure increases. Which distance increases?

What causes the random, zig-zag movement (Brownian motion) of smoke particles suspended in air?

A sealed bottle of constant volume contains air.
The air in the bottle is heated by the Sun.
What is the effect on the average speed of the air molecules in the bottle, and the average distance between them?
[Table_1]

The diagram shows a liquid-in-glass thermometer.

How can the thermometer be made more sensitive?

In an experiment to measure specific heat capacity, a block of aluminium is heated and its rise in temperature is measured.
The amount of energy gained by the block is $E$. The mass of the block is $m$. The rise in temperature of the block is $\Delta T$.
Which expression gives the specific heat capacity of aluminium?

Which row shows the surface that is the better absorber and the surface that is the better emitter of infra-red radiation?
[Table with options]

A student suggests some uses for containers made from good thermal conductors and for containers made from poor thermal conductors. In which row are both suggested uses correct? [Table_1]

A water wave passes into a region where the wave travels more slowly.
As it passes into the slow region, what happens to the frequency and what happens to the wavelength of the wave?

Which row shows the natures of light waves, sound waves and X-rays? [Table_1]

The diagram shows an object in front of a plane mirror. The mirror forms an image of the object.
At which labelled point is the image formed, and which type of image is formed?

Light enters a glass block at an angle of incidence of 46°. The light refracts at an angle of refraction of 26°. What is the refractive index of the glass?

The diagram shows a converging lens forming an image of an object.
Which statement about the image is correct?

The sound from a loudspeaker must pass through two materials to reach a microphone.

Which combination of materials gives the shortest time for the sound to reach the microphone?

Which range of wave frequencies includes only sounds that can be heard by a human with normal hearing?

Each diagram shows two charged metal plates.
Which diagram shows the pattern and the direction of the electric field between the plates?

The four circuits shown all include an a.c. power supply, two diodes and a lamp. In which circuit is there a rectified current in the lamp?

The diagram shows a battery connected to two resistors.

Four students separately measure the electromotive force (e.m.f.) of the battery, the current in the resistors, and the potential difference (p.d.) across resistor R. Their results are shown in the table below. Which row shows values with their correct units?
[Table_1]

A $3.0\,\Omega$ resistor and a $6.0\,\Omega$ resistor are connected in parallel.

What is their combined resistance?

The diagram shows a combination of logic gates.
Input P is at a logic state 0 (low) and input Q is at a logic state 1 (high).
What are the logic states at output X and at output Y?

The diagram shows part of a circuit used to switch street lamps on and off automatically.

In the evening it gets dark.
Which row shows the effect on the resistance of the light-dependent resistor (LDR) and on the potential difference (p.d.) across it?

A domestic circuit includes a 30A fuse. This protects the wiring if there is too much current in the circuit. In which wire is the 30A fuse positioned, and what does it do when it operates? [Table_1]

A strong electromagnet is used to attract pins. What happens when the current in the coil is halved?

The diagram shows a transformer.



The input voltage is 240V.
What is the output voltage?

The diagram shows a shaded area where the direction of a magnetic field is into the page. A beam of $\beta$-particles enters the field as shown. In which direction is the beam of $\beta$-particles deflected as they enter the magnetic field?

Below are four statements about isotopes of a certain element.
Which statement about the isotopes must be correct?

Which diagram represents an experiment that provided evidence for the nuclear atom?

Sodium-24 decays to magnesium-24 according to the following equation.
$$^{24}_{11}\text{Na} \to ^{24}_{12}\text{Mg} + \text{emitted particle}$$
What is the emitted particle?

The reading on a detector placed near a radioactive material is 536 counts per second.
The background count rate is 44 counts per second.
The half-life of the radioactive material is 34 hours.
What is the reading on the detector after 68 hours?