Cambridge IGCSE Physics - 0625 - Core Paper 1 2009 Summer Zone 1

A metre rule is used to measure a length.
Which reading is shown to the nearest millimetre?

The graph represents the movement of a body.

How far has the body moved after 5 s?

A car travels 100 km. The highest speed of the car is 90 km/h, and the lowest speed is 30 km/h. The journey takes two hours.
What is the average speed for the journey?

Which statement about the masses and weights of objects on the Earth is correct?

The table shows the weight in newtons of a 10 kg mass on each of four planets.
[Table_1]

The diagram shows a force meter (spring balance) being used.


On which planet is the force meter (spring balance) being used?

Which items of apparatus are required to determine the density of a liquid?

Which property of an object cannot be changed by a force?

A wooden plank rests in equilibrium on two boulders on opposite sides of a narrow stream. Three forces of size $P$, $Q$ and $R$ act on the plank.

How are the sizes of the forces related?

Electricity can be obtained from different energy resources.
Which energy resource is used to obtain electricity without producing heat to boil water?

Four people of equal weight on a beach use different routes to get to the top of a sea wall.

The image shows a diagram illustrating this scenario: .

Which person produces the greatest average power?

The diagrams show two mercury barometers standing side by side. The right-hand diagram shows a tube of bigger diameter, but the diagram is incomplete. There is a vacuum above the mercury in both tubes.
Which labelled position on the right-hand tube could show the mercury level in that tube?

A student fills two containers with water (density 1.0g/cm^3) and two with oil (density 0.8 g/cm^3), as shown in the diagrams.
In which container is the pressure on the base the greatest?

In an experiment, some of a substance changes from a liquid to a gas. The temperature of the remaining liquid changes because of this.
What is the name for this change of state and how does the temperature change?
[Table_1]

A piston traps a certain mass of gas inside a cylinder. Initially the piston is halfway along the length of the cylinder. The piston is now moved towards the open end of the cylinder. The temperature of the gas remains constant.



How are the density and the pressure of the gas affected by moving the piston?

The graph shows the change in temperature of a substance as it is heated steadily. Which part of the graph shows when the substance is boiling?

Four blocks, made of different materials, are each given the same quantity of internal energy (heat).
Which block has the greatest thermal capacity?

A rod is made up of copper and wood joined together. After the rod is heated at the join in the centre for about a minute, where would the lowest temperature be?

The diagram shows a fire.
Why does the smoke rise above the fire?

The diagrams show water waves that move more slowly after passing into shallow water at the broken line.
Which diagram shows what happens to the waves?

The diagrams show examples of wave motion.

Which are longitudinal waves?

Which diagram shows what happens when a ray of white light passes through a prism?

The diagram shows the path of a ray of light passing through a principal focus F of a lens.
Which broken line shows the direction of the ray after it leaves the lens?

A small boat in a harbour is protected from waves on the sea by harbour walls.
Some waves can curve round the harbour walls and reach the boat. What is the name for this effect?

An engineer standing at P sees an explosion at X. After the explosion, she hears two bangs. One bang is heard a fraction of a second after the other. The second bang is an echo. From which surface has the sound reflected to cause this echo?

The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result, magnetic poles are induced in the iron bar.

What are the magnetic poles induced at P and at Q?

An electromagnet is used to separate magnetic metals from non-magnetic metals. Why is steel unsuitable as the core of the electromagnet?

Which particle does not experience a force due to an electric field?

Using the circuit shown, the current $I$ is found for various voltages $V$. The temperature of the resistor does not change.

Which graph shows the results obtained?

In the circuit shown, ammeter X reads 0.5 A.
What does ammeter Y read?

In the circuits shown, all the resistors are identical. Which circuit has the least resistance?

In the circuit below, one of the lamps breaks, causing all the other lamps to go out.
Which lamp breaks?

Either a fuse or a circuit-breaker can be used to protect electrical cables from large currents that could cause overheating. If a fuse is used, in which position in the circuit should it be connected, and if a circuit-breaker is used, in which position should it be connected?

The current in a lamp at full brightness is 0.25A. The flexible cable to the lamp is designed for currents up to 5.0A, so it can safely carry the 0.25A taken by the lamp. Which fuse should be inserted in the plug at the other end of the flexible cable?

A wire perpendicular to the page carries an electric current in a direction out of the page. There are four compasses near the wire.
Which compass shows the direction of the magnetic field caused by the current?

A transformer has 50 turns on its primary coil and 100 turns on its secondary coil. An alternating voltage of 25.0 V is connected across the primary coil.



What is the voltage across the secondary coil?

In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles?

The diagram shows a cathode-ray tube.
A student wants the cathode rays to make a spot at P on the screen.
Which parts of the cathode-ray tube should be positive?

A radioactive nucleus contains 138 neutrons. The nucleus emits an \( \alpha \)-particle.
How many neutrons are in the nucleus after it has emitted the \( \alpha \)-particle?

The graph shows the decay curve for one particular radioactive nuclide.

What is the half-life of this nuclide?

$^{16}_{7}\text{N}$ is the symbol for a particular nuclide of nitrogen.
How many nucleons does this nuclide contain?