Cambridge IGCSE Physics - 0625 - Core Paper 1 2016 Winter Zone 3

Diagram 1 shows a measuring cylinder containing some water.
Diagram 2 shows the same measuring cylinder after a piece of rock has been slowly submerged in the water.

What is the volume of the piece of rock?

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?

Which statement about mass or weight is not correct?

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

The volume of liquid in the container is 600 cm³.
What is the density of the liquid?

The diagram shows all the horizontal forces acting on a truck. What is the size of the resultant horizontal force on the truck?

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 400 N?

A uniform bar is pivoted at its centre.
What force $F$ is needed to balance the bar?

A ball is released from point X on a rough semicircular track. It comes to rest for an instant at point Y. The gravitational potential energy of the ball at point X is $E_X$. The gravitational potential energy of the ball at point Y is $E_Y$.

Which equation relates the energy of the ball at point X to its energy at point Y?

Two cars P and Q have different engines.
The input power from the fuel is the same for both engines. The engine in car P is more efficient than the engine in car Q.
Which statement about the cars or their engines must be true?

A child runs up a set of stairs four times. The time taken for each run is recorded.
Which time is measured when the child's useful power is greatest?

The diagrams show the actual sizes of the heels of four different shoes, as seen from underneath the shoe. Which heel is most likely to cause damage to wooden floors?

The diagram shows an instrument used to measure gas pressure.
What is the instrument called?

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

A cylinder containing trapped air is put into a freezer.

As the air cools, the piston moves to the left as shown.
How has the air changed?

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 liquid-in-glass thermometer works because the liquid shows a change in

Which description applies to infra-red radiation?

The diagram shows the temperature-time graph for hot water that is cooling in an uninsulated beaker.



The beaker is now insulated. The same volume of hot water, at the same initial temperature as before, is put into the insulated beaker. The beaker is in the same room as before.

Which is the new temperature-time graph for the water as it cools?

A small plastic ball floats on the surface of deep water. A stone is dropped into the water at point X.
A wave spreads out across the water surface, causing the ball to move.

Which type of wave is produced by the stone, and in which direction does the ball move?

Waves travel more slowly on the surface of shallow water than on the surface of deep water. Which diagram shows a wave travelling from deep water into shallower water?

Light strikes a plane mirror and is reflected. The angle between the ray of light and the mirror is 20°.
What is the size of the angle of reflection?

A student draws a ray diagram to show how a converging lens, of focal length $f$, forms an image of an object.
He draws three rays to locate the image.
He then adds a fourth ray after the position of the image is known.
Which of the labelled rays must have been drawn after the position of the image was known?

Which group shows four electromagnetic waves in order, from the largest wavelength to the smallest?

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?

In two separate experiments, a magnet is brought near to an unmagnetised iron bar. This causes the bar to become magnetised.
experiment 1: ![Image of a magnet with poles N and S approaching an iron bar labeled X]
experiment 2: ![Image of a magnet with poles S and N approaching an iron bar labeled Y]
Which magnetic pole is induced at X and at Y?

A student holds a rod in his hand.

[Image_1: A diagram showing a hand holding a rod with a cloth beside it labelled 'cloth', 'hand', and 'rod']

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?

The diagram shows a lamp in a circuit.

Which change to the circuit would increase the current in the lamp?

An ammeter and an 18Ω resistor are connected in series with a battery. The reading on the ammeter is 0.50A.

What is the electromotive force (e.m.f.) of the battery?

In which circuit will the ammeter reading be greatest?

An electric washing machine is protected by an earth wire.
To which part of the washing machine should the earth wire be connected?

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?

Why is a fuse used in an electrical circuit?

Which transformer can change a 240V a.c. input into a 15V a.c. output?

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]

A nuclide of sodium can be represented by $^{23}_{11}\text{Na}$.
Which row gives the numbers of particles in a neutral sodium atom?
[Table_1]

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

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?

A radioactive material emits $\alpha$-particles. The table shows the rate of emission of $\alpha$-particles from the material at different times.
[Table_1]
What is the half-life of the material and what is the missing value at 8.0 hours?