Cambridge IGCSE Physics - 0625 - Core Paper 1 2014 Summer Zone 2

The diagram shows part of a ruler. The ruler is used to find the length of a nail.

What is the length of the nail?

Which distance/time graph represents the motion of an object moving at constant speed?

A car takes 15 minutes to travel along a road that is 20 km long.
What is the average speed of the car?

A customer goes to a market and buys some rice. The stallholder pours rice into a dish that hangs from a spring balance. He records the reading on the spring balance.

The customer then buys some pasta and the stallholder notices that the reading on the spring balance, with just pasta in the dish, is the same as it was with just rice in the dish.
The rice and the pasta must have the same

The table gives the volumes and masses of four objects. Which object has the greatest density?
[Table_1]

A wooden bar is pivoted at its centre so that it can rotate freely. Two equal forces $F$ are applied to the bar. In which diagram is the turning effect greatest?

A student adds weights to an elastic cord. He measures the length of the cord for each weight. He then plots a graph from the results, as shown.
What has he plotted on the vertical axis?

In a hydroelectric power station, one form of energy is stored in a lake or reservoir. This energy is then transferred in stages to another useful form, which is the output. Which row gives the name of the stored energy and the name of the output energy? [Table_1]

A certain machine is very efficient.
What does this mean?

The diagram shows a simple mercury barometer.

Atmospheric pressure decreases. What happens to the level of the mercury at P and what happens to the level of the mercury at Q?

A student places four identical beakers on a bench.
Two beakers contain salt water of density $1.1\, \text{g/cm}^3$ and two beakers contain pure water of density $1.0\, \text{g/cm}^3$.
Which beaker exerts the greatest pressure on the bench?

A student places his thumb firmly on the outlet of a bicycle pump, to stop the air coming out.
What happens to the pressure and what happens to the volume of the trapped air as the pump handle is pushed in?

The diagram represents molecules of gas moving in a container.
What happens to the gas molecules when the temperature of the gas increases?

A liquid-in-glass thermometer is marked with a scale in °C. What is the temperature difference between the two fixed points for this thermometer?

Which statement gives the thermal capacity of a solid body?

In an experiment, a thermometer is placed in a test-tube of hot liquid. The temperature of the liquid is recorded every half minute. The table shows the results.
[Table_1]
What is the melting point of the substance?

The diagram shows an air-conditioning unit on the wall of a room. The unit draws in warm air from the room and releases cold air into the room.



What happens to the cold air and why?

Which statement about thermal radiation is correct?

Scout P signals to scout Q on the other side of a valley by using a mirror to reflect the Sun's rays.
Which mirror position would allow the Sun's rays to be reflected to scout Q?

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 of this effect?

Which statement about ultraviolet waves is correct?

A boy wears a shirt with a letter F on the front. He stands in front of a plane mirror.

What does he see in the mirror?

Rays of light enter and leave a box.

What could be inside the box to make the rays behave as shown?

The diagrams show the wave patterns of four sounds shown on a cathode-ray oscilloscope (c.r.o.). The oscilloscope controls are set the same for each sound. Which sound has the highest pitch?

A lighted candle is placed in front of a loudspeaker that is making a loud, steady note. The candle flame vibrates because of the sound wave. Which type of waves are sound waves and in which direction does the flame vibrate? [Table_1]

Which row correctly shows whether copper and steel are ferrous or non-ferrous? [Table_1]

A steel magnet is placed inside a coil of wire. There is a large alternating current in the coil. The magnet is slowly moved out of the coil to position P.

How has the steel changed, if at all, when it reaches position P?

Two balloons, X and Y, are suspended by insulating threads. They are each held near a negatively charged balloon. The balloons hang as shown.
What is the charge on balloon X and what is the charge on balloon Y?

Which quantities is a voltmeter used to measure?

The diagram shows a lamp and a resistor connected in a circuit. The lamp is too bright.

Which change to the circuit will decrease the current in the lamp and make it less bright?

Which statement is not correct for lamps connected in parallel?

A student connects a circuit using an uncharged capacitor C, with a large capacitance, and a resistor R, with a high resistance.
The switch is closed. The reading on the voltmeter P rises immediately to a maximum value, then starts to fall gradually.

What happens to the reading on the voltmeter Q and what happens to the energy stored in the capacitor?

Which labelled component in the circuit shown controls the brightness of lamp X?

In the circuit shown, the current from the battery divides equally between the two lamps. Each ammeter reads 6.0 A. What is a suitable rating for the fuse in this circuit?

A metal wire is placed between the poles of a magnet.
The wire can be moved in each of three directions OP, QR and ST.

In which direction or directions must the wire be moved to induce an e.m.f. across the ends of the wire?

A transformer has 100 turns on its primary coil and 25 turns on its secondary coil. The primary coil is connected to a 12V a.c. supply.



What is the voltage induced across the secondary coil?

A beam of cathode rays passes between two parallel metal plates connected to a high-voltage d.c. power supply.
Which path does the beam follow?

Compared with $\beta$-particles and $\gamma$-rays, $\alpha$-particles

The diagram shows a box used for storing radioactive sources.
Which material is best for lining the box to prevent the escape of most radioactive emissions?

A particular nuclide of chlorine can be represented by the symbol shown.
$$\begin{array}{c} ^{37}_{17}Cl \end{array}$$
How many electrons are there in a neutral atom of this nuclide?