Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2018 Winter Zone 2

The diagram shows part of a micrometer screw gauge. What is the smallest reading that can be achieved using this micrometer screw gauge?

The speed-time graph shows the motion of a car. At which time is its acceleration greatest?

An athlete runs at a speed of 8 m/s for 10 s, and then at a speed of 6 m/s for 12 s.
Which calculation gives the average speed of the athlete in m/s?

A helium balloon is tied to a top-pan balance. A metal block of mass 100 g is placed on the balance. The reading on the balance is 91 g.

Which statement can be deduced from this experiment?

The diagram shows four blocks of different metals. Each block has a mass of 12 g. Which metal has the largest density?

The graph shows how the length of a spring changes when the stretching force is increased. In the Hooke's law region, what is the spring constant for this spring?

Point X is the centre of mass of a lamina in the shape of a triangle with sides of equal length. The top of the triangle is cut off along the dotted line shown.

What happens to the centre of mass, X?

An object of mass 3.0 kg, travelling at a speed of 6.0 m/s, collides with an object of mass 2.0 kg, travelling in the opposite direction at a speed of 2.0 m/s.

The objects stick together during the collision.

What is the speed and direction of the combined mass after the collision?

Which device is designed to convert chemical energy into kinetic energy?

The diagram shows a pendulum.

The pendulum swings from P to Q to R and back to P.
P is 10 cm higher than Q.
At which speed does the pendulum bob pass through Q?

A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration.
When the bricks are 5.0 m from the ground, they have a speed of 5.0 m/s.
How much work is done during this process?

A manometer is used to measure the pressure of a gas supply.
Which change gives a greater value of height $h$?

A washbasin has an exit pipe covered with a plug of area $12 \text{ cm}^2$. A chain is attached to the centre of the plug to assist in pulling the plug away from the exit hole. The washbasin contains water to a depth of $0.080\text{ m}$.
The density of the water is $1000 \text{ kg/m}^3$.



What is the force acting on the plug due to the water?

Diagram 1 shows apparatus being used to observe smoke particles.
Diagram 2 shows how a smoke particle moves randomly.

Why do the smoke particles move randomly?

A closed container of gas is heated. The pressure of the gas increases. Which statement explains this increase in pressure?

The metal lid on a glass jar is difficult to unscrew. The jar is placed in a warm oven until the jar and the lid reach the same temperature. The lid is now easily unscrewed. Which property accounts for this?

A block of iron of mass $M$ is heated and gains 10 kJ of internal energy. The temperature of the block rises by $\theta$ °C.
A second block of iron of mass $2M$ is heated and gains 5.0 kJ of internal energy.
What is the temperature rise of the second block in °C?

Which factors affect the sensitivity of a thermometer?
1 the diameter of the bore of the tube
2 the length of the capillary tube
3 the thickness of the bulb wall

Which statement about convection is not correct?

A lamp has a metal filament that glows when heated by an electric current.
The middle of the filament is at a very high temperature. The ends of the filament, which are connected to the base of the lamp, are cooler.
Which statement is correct?

Plane water waves travel from a shallow region into a deeper region. They travel more quickly in the deeper water. Which diagram shows the wave pattern in the deeper water?

A thin converging lens has a focal length of 6.0 cm. An observer looks through the lens at an object which is placed 4.0 cm from the lens.

Which description of the image that is observed is correct?

A transmitter produces radio waves of wavelength 1500 m. It takes the waves 0.025 s to travel from the transmitter to a radio receiver.
What is the distance between the radio transmitter and the receiver?

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: Ultraviolet waves are used for intruder alarms.
statement 4: X-rays are used for security checks.

Which statements are correct?

A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet.
Four microphones are placed equal distances from S.
Which microphone detects the sound from S first?

The diagram shows a bar magnet at rest on a smooth horizontal surface. A length of soft-iron wire is held parallel to the magnet.
The wire is released.
What happens?

The diagram shows point X between two charged plates.
Which diagram shows the electric field pattern near point X?

A bar magnet is placed inside a current-carrying coil. The diagram shows four different experiments.

In which experiments is the magnet demagnetised?

Copper wire is available in fixed lengths but in various diameters $d$. Each diameter has a different resistance $R$.
Which relationship between $R$ and $d$ is correct?

A student investigates the resistance of a lamp.
Which row states how the meters must be connected?
[Table_1]

The circuit shown is used to change the voltage $V_{out}$ as the temperature of device X changes.
Which row is correct?

The circuit diagram shows a d.c. power supply connected to two resistors $R_1$ and $R_2$ and four diodes.

Which statement is correct?

A logic gate has inputs 0,0 and an output 1.
Which two types of logic gate behave in this way?

Either a fuse or a circuit-breaker can be used to protect electrical cables from large currents that could cause overheating.

When a fuse is used, where should it be connected, and when a circuit-breaker is used, where should it be connected?

Electrical power is transmitted at 400kV and transformed down to 240V before being delivered to consumers.
Which statement is correct?

The diagram shows a coil of wire between the poles of a magnet.

The coil consists of 20 turns of insulated wire. The coil is connected to a variable resistor and a power supply.
How can the turning effect on the coil be increased?

Which diagram represents the structure of a neutral atom?

A radioactive nucleus $^{220}_{86}\text{Rn}$ decays in two stages to produce $^{212}_{82}\text{Pb}$.
Which two particles are emitted in this process?

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

The count rate measured when near a radioactive source drops from 542 counts per minute to 94 counts per minute in 12 hours. The background count remains constant at 30 counts per minute.
What is the half-life of the source?