Cambridge IGCSE Physics - 0625 - Core Paper 1 2012 Summer Zone 1

A cylindrical can is rolled along the ruler shown in the diagram.

The can rolls over twice.
What is the circumference (distance all round) of the can?

A car is moving downhill along a road at a constant speed. Which graph is the speed/time graph for the car? [Graph Options A, B, C, D]

In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours.
What is the average speed of the car?

Which quantity is measured in newtons?

A geologist places a small rock on the left-hand pan of a balance. The two pans are level as shown when masses with a total weight of 23N are placed on the right-hand pan. Take the weight of 1.0kg to be 10N.

What is the mass of the small rock?

A stone has a volume of 0.50 cm³ and a mass of 2.0 g.
What is the density of the stone?

Passengers are not allowed to stand on the upper deck of double-decker buses.
[Image_1: Diagram of a double-decker bus showing upper and lower decks]
Why is this?

The diagram shows a handle with three forces, each 100 N, applied to it. The handle is free to move.

What is the effect of the forces on the handle?

In which pair of energy sources are both sources renewable?

An object on a thread is swinging between X and Z, as shown in the diagram. It is momentarily at rest at X and at Z.

An incomplete word equation about the energy of the object is shown below.

gravitational potential energy at X = kinetic energy at Y + ........ energy at Y + energy losses

Which form of energy is needed to complete the word equation?

Which statement is explained by reference to pressure?

The diagram shows a mercury manometer used to measure the pressure of gas in a container. Atmospheric pressure is 76 cm of mercury.

What is the pressure of the gas?

Brownian motion is observed when looking at smoke particles in air using a microscope.
What causes the smoke particles to move at random?

The molecules of a substance become more closely packed and move more quickly. What is happening to the substance?

Which pair contains only physical quantities that vary with temperature and so could be used in making a thermometer?

A heater supplies 80 J of energy to a block of metal. The temperature of the block rises by 20°C.
What happens to the block of metal when its temperature falls by 10°C?

An engineer wants to fix a steel washer on to a steel rod. The rod is just too big to fit into the hole of the washer.\n\n[Image_1: steel washer and steel rod diagram]\n\nHow can the engineer fit the washer on to the rod?

Why does convection take place in a liquid when it is heated?

Two plastic cups are placed one inside the other. Hot water is poured into the inner cup and a lid is put on top, as shown.
Which statement is correct?

What is the unit of wavelength?

Which row correctly describes light waves and radio waves? [Table_1]

The diagram shows water waves passing through a gap in a harbour wall. The waves curve round the wall and reach a small boat in the harbour.
What is the name of this curving effect, and how can the gap be changed so that the waves are less likely to reach the boat?

The image formed by a plane mirror is upright.
What are the other characteristics of the image?

A student draws three rays of light from point P through a converging lens. Each point labelled F is a principal focus of the lens.
Which of the rays are drawn correctly?

A girl stands at a distance from a large building. She claps her hands and a short time later hears an echo.
Why is an echo produced when the sound waves hit the building?

The diagrams represent the waves produced by four sources of sound. The scales are the same for all the diagrams. Which sound has the highest frequency?

Which statement describes a property of a magnet?

Which procedure may be used to demagnetise a steel bar?

In which unit is potential difference measured?

The circuit shown in the diagram contains an unknown component X, hidden in a box.
The voltage-current graph for X is as shown.

What is the component X?

Which circuit contains a fuse?

A thermistor is used in a circuit to control a piece of equipment automatically. What might this circuit be used for?

A student connects a variable potential divider (potentiometer) circuit. What happens to the reading on the voltmeter as the sliding terminal T is moved from R to S?

A circuit-breaker is designed to protect a circuit which usually carries a current of 2A. The time taken to break the circuit depends on the current, as shown in the graph. [Graph]
What happens when the current in the circuit is 2A and what happens when the current is 18A?

The diagram shows a coil connected to a battery and a switch. Two unmagnetised iron bars hang freely near opposite ends of the coil.
What happens to the iron bars when the switch is closed?

A wire passes between the poles of a horseshoe magnet. There is a current in the wire in the direction shown, and this causes a force to act on the wire.
Three other arrangements, P, Q and R, of the wire and magnet are set up as shown.
Which arrangement or arrangements will cause a force in the same direction as the original arrangement?

The diagram shows a device to produce cathode rays.

Which part of the device is heated and why?

A radioactive nucleus emits a $\beta$-particle.
What happens to the proton number (atomic number) of the nucleus?

The diagram shows the paths of three different types of radiation, X, Y and Z. Which row in the table correctly identifies X, Y and Z?

Which diagram could represent the structure of a neutral atom?