Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2018 Winter Zone 1

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

A small, light ball is dropped from the top of a tall building. Which graph shows how the speed of the ball changes with time?

A runner runs 300 m at an average speed of 3.0 m/s. She then runs another 300 m at an average speed of 6.0 m/s.
What is her average speed for the total distance of 600 m?

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?

A liquid has a volume of $0.040 \text{ m}^3$ and a mass of $30\,000 \text{ g}$.
What is the density of the liquid?

A resultant force of 4.0 N acts on an object of mass 0.50 kg for 3.0 seconds.
What is the change in velocity caused by this force?

Which quantities are both vectors?

A moving ball with a momentum of 25 kg m/s collides head-on with a wall.

It rebounds from the wall with the same speed but in the opposite direction. The time of collision is 50 ms.

What is the average force exerted on the wall by the ball during the collision?

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

An object, initially at rest, is dropped from a height of 12.0 m. The change in gravitational potential energy when it falls to the ground is 565 J.

The frictional forces are negligible.

What is its speed when it hits the ground?

A man climbs a ladder. Which two quantities can be used to calculate the useful power of the man?

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?

The gas in a sealed container is compressed at constant temperature.
Which graph shows how the pressure of the gas changes with its volume?
[Image of graphs shown: A, B, C, D]

The distance between two electricity pylons is 60 m. An engineer fits a cable of length 62 m between the pylons. Why does the engineer choose a cable that is longer than the distance between the two pylons?

The diagram shows a liquid-in-glass thermometer.
Which change increases the sensitivity of the thermometer?

An object of mass 800g and specific heat capacity 250 J/(kg°C) is heated. It absorbs 5300 J of energy.
What is the increase in temperature of the object?

On a cold day, a shiny metal rod feels colder to the touch than a black plastic rod. Which statement explains this observation?

One end of a copper bar is heated to a high temperature. Which mechanism is responsible for the transfer of thermal energy to the other end of the copper bar?

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?

Which statement about the image formed by a plane mirror is correct?

A ray of light is incident on a glass-air surface. The diagrams show the ray of light at different angles of incidence in the glass.

What is the refractive index of the glass?

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?

Iron is used for the core of a transformer and steel is used to make a bar magnet.
Which statement explains these uses of iron and of steel?

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?

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

In which experiments is the magnet demagnetised?

The diagrams represent two different electric fields.

A single electron is located in each of the fields.
Which row gives the correct direction of the force on the electron and the field in which there is a larger force on it?

The resistance of a component in a circuit is found using an ammeter and a voltmeter.
How are the ammeter and the voltmeter connected?

The table gives data for four different electrical devices. Which device develops the greatest power?
[Table_1]

The circuit diagram shows a fixed resistor R and a thermistor T used in a potential divider circuit.
V_R and V_T are the potential differences across R and T respectively.
What happens to V_R and to V_T as the temperature of the thermistor decreases?

The circuit diagram shows a power supply connected to some circuit components.
In the diagram, P and Q are the terminals of the d.c. power supply.

Under which circumstances does the ammeter show a reading other than zero?

The diagram shows a digital circuit with two inputs and one output.
What describes the action of the circuit?

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?

There is a current of 3.0 A in a conductor.
The current is changed to 6.0 A in the opposite direction.
Which effect does this have on the magnetic field around the conductor?

A wire is placed in a strong magnetic field. When a current is passed through the wire it moves upwards, as shown. The current is reversed. In which direction does the wire move?

Which diagram represents the structure of a neutral atom?

When a uranium-235 nucleus absorbs a neutron, it becomes unstable and undergoes fission. The fission process produces a barium (Ba) nucleus, a krypton (Kr) nucleus and 3 neutrons. The fission process is represented by the nuclear equation shown. $$\frac{1}{0}n + \frac{235}{92}U \rightarrow \frac{144}{56}Ba + \frac{A}{Z}Kr + 3\frac{1}{0}n$$ Which symbol represents the resulting krypton nucleus?

The diagram shows the paths of three different types of radiation X, Y and Z.

Which row correctly identifies X, Y and Z?

A scientist measures the count rate of a radioactive sample in a laboratory over a period of 12 weeks.
The background radiation count rate in the laboratory remains constant at 20 counts per minute.
The table shows the scientist's results before the background radiation count rate is taken into account.
[Table_1]
In which range does the half-life of the radioactive isotope lie?