Cambridge IGCSE Physics - 0625 - Core Paper 1 2013 Summer Zone 3

The diagrams show the readings on a measuring cylinder before and after a small metal cube is added. How many more identical cubes can be added to the cylinder, without causing the water to overflow? Do not include the cube already in the cylinder.

A car travels at various speeds during a short journey.
The table shows the distances travelled and the times taken during each of four stages P, Q, R and S.
[Table_1]
During which two stages is the car travelling at the same average speed?

Which person is experiencing an acceleration?

A 1 kg sample of aluminium is stored in a laboratory. In a different laboratory, in the same town, there is a 1 kg sample of iron.
Which quantity must these two samples always have in common?

Two blocks of metal X and Y hang from spring balances, as shown in the diagrams.
What does the diagram show about X and Y?

A car moves along a level road. The diagram shows all of the horizontal forces acting on the car.
Which statement is correct?

A measuring cylinder has a mass of 120g when empty.
When it contains 50cm³ of a liquid, the total mass of the measuring cylinder and the liquid is 160g.
What is the density of the liquid?

The diagram shows a hydroelectric system. What are the main energy changes taking place?

The diagram shows a force being applied to a lever to lift a heavy weight.
Which change would enable the heavy weight to be lifted with a smaller force?

A man stands on the ground.
Which action will increase the pressure that the man exerts on the ground?

An escalator (moving stairs) and a lift (elevator) are both used to carry passengers from the same underground railway platform up to street level. ![Image of an escalator and lift] The escalator takes 20 seconds to carry a man to street level. The useful work done is $W$. The useful power developed is $P$. The lift takes 30 seconds to carry the same man to street level. How much useful work is done by the lift, and how much useful power is developed by the lift? [Table_1]

The diagram shows a simple mercury barometer.

Which length is used to find the value of atmospheric pressure?

A thermometer bulb is covered by a piece of damp absorbent cloth.

Air at room temperature is blown across the damp cloth.
What happens to the thermometer reading?

The diagrams show four blocks of steel. The blocks are all drawn to the same scale. The same quantity of thermal energy (heat) is given to each block. Which block shows the greatest rise in temperature?

A gas storage tank has a fixed volume. The graph shows how the temperature of the gas in the tank varies with time.
[Image_1: Graph showing temperature versus time]
At time Y, the gas molecules are

A mercury thermometer with no scale is taped to a ruler as shown.
When the thermometer is placed in steam, the mercury level rises to 22.0 cm.
When the thermometer is placed in pure melting ice, the mercury level falls to 2.0 cm.

Which temperature is shown by the mercury level in the diagram?

The diagram shows a refrigerator.
The cooling unit is placed at the top. The cooling unit cools the air near it.
What happens to the density of the air as it cools, and how does it move?

The diagram shows the cross-section of a vacuum flask containing a hot liquid in a cold room. X and Y are points on the inside surfaces of the walls of the flask.
How is thermal energy transferred between X and Y?

Visible light and $\gamma$-rays are both waves. How may they correctly be described? [Table_1]

Different parts of the electromagnetic spectrum are used for different purposes. Below are four statements about parts of the spectrum.

statement 1: Infra-red waves are used in television remote controllers.
statement 2: Radio waves are used to transmit television pictures from satellites to Earth.
statement 3: Ultra-violet waves are used for intruder alarms.
statement 4: X-rays are used for security checks.

Which statements are correct?

The diagram represents a wave.

How many wavelengths are there between X and Y?

Which diagram shows how a ray of light could pass through a glass block in air?

Which diagram correctly represents rays of light passing through a converging lens in a camera?

The diagrams represent two sound waves. The scales in the two diagrams are the same.
Which statement describes the waves?

Two soft-iron rods are placed end to end inside a coil which is connected to a battery. The connections from the battery to the coil are now reversed. What happens to the soft-iron rods in each case?

A student claps once when standing 100 m away from a large wall.
The speed of sound in air is 330 m/s.
How long after clapping does the student hear an echo?

Which statement about magnetism is correct?

Three charged balls, P, Q and R are suspended by insulating threads. Ball P is negatively charged.

Ball Q is brought close to ball P.



Ball Q is now brought close to ball R.



What are the charges on ball Q and on ball R?

Which copper wire would have the smallest resistance?

The diagram shows an electrical circuit.

Between which two points must a voltmeter be connected to find the potential difference across the bell?

Which circuit could be used to determine the resistance of the resistor R?

The circuit shows a battery and four lamps. All the lamps are lit.
One lamp fails and all the lamps go out.
Which lamp failed?

The reading on the ammeter in the circuit is 1.0 A.
A second ammeter is connected in the circuit. It also reads 1.0 A.
At which labelled point is it connected?

A desk lamp should have a 3 A fuse fitted, but a 13 A fuse has been fitted by mistake. The lamp is not faulty. The lamp is switched on. What happens?

The diagram shows a mains transformer that has an output voltage of 12 V.

How many turns of wire are in the secondary coil?

An electric current can produce a heating effect and a magnetic effect. Which row shows the effect that a relay uses, together with one application of a relay?

[Table_1]

In a cathode-ray tube, particles are fired at a screen. What are these particles?

The diagram shows an experiment to demonstrate electromagnetic induction.

X and Y are joined, in turn, by four wires, each made of a different material.
Each wire is then moved quickly downwards between the magnets. Which material will not give rise to an induced current in the wire?

The diagram represents a carbon atom.

What is the nucleon number (mass number) for this atom?

The graph shows how the count rate on a detector due to a radioactive source changes with time.
What is the count rate at 5.0 hours?