Cambridge IGCSE Physics - 0625 - Supplement Paper 2 2018 Winter Zone 3

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

An object falls in a gravitational field with air resistance.
Which distance-time graph shows this motion?

A boy runs 400 m at an average speed of 4.0 m/s.
He runs the first 200 m in 40 s.
How long does he take to run the second 200 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 student carries out experiments to find the mass and the volume of four samples of rock. The graph shows the results. Which pair are samples of the same type of rock?

An object accelerates from 10 m/s to 30 m/s in 4.0 seconds.
The accelerating force is 150 N.
What is the mass of the object?

The diagram shows a uniform bar of length 120cm and weight $W$. The bar is pivoted at a point 40cm from the left end of the bar.
A load of $\frac{W}{2}$ is suspended from the right-hand end of the bar.
A downward force $F$ is applied to the left-hand end of the bar to keep it in equilibrium.

What is the magnitude of force $F$?

An electron is moving at a speed of $5 \times 10^6 \text{ m/s}$. A neutron is moving at a speed of $5 \times 10^4 \text{ m/s}$.
The mass of the electron is $m$.
The mass of the neutron is $2000m$.
Which row is correct?

[Table_1]

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

A barrel of mass 40kg is raised to a height of 1.5m by rolling it up a ramp. The length of the ramp is 8.0m. The force F applied to the barrel acts parallel to the ramp. The frictional force is negligible.

Which row is correct?

What is the main process by which energy is produced in the Sun?

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 bubble of air has a volume of $2.0\,\text{cm}^3$ at the bottom of a lake where the total pressure is $4.0 \times 10^5 \, \text{Pa}$. The temperature of the water in the lake is constant. The atmospheric pressure at the surface is $1.0 \times 10^5 \, \text{Pa}$.

What is the volume of the bubble when it rises to the surface?

Which row shows the relative order of thermal expansion of solids, liquids and gases?
[Table_1]

A block of ice is at a temperature of $-100\degree C$. Energy is supplied at a constant rate. The graph shows how its temperature changes.



At which points has the ice completely changed state to water and all the water completely changed state to steam?

The temperature of the water at the bottom of a waterfall is greater than the temperature of the water at the top.

The gravitational potential energy of the water at the top is transferred to thermal energy at the bottom.

The specific heat capacity of water is 4200 J/(kg°C).

What is the temperature difference for a waterfall of height 21 m?

One end of a shiny metal rod is heated and the other end quickly gets hot.
Which statement describes why the other end quickly gets hot?

Four different surfaces are at the same high temperature.
Which surface will emit thermal radiation at the slowest rate?

[Table_1]

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?

An object is placed 8.0 cm from a thin converging lens of focal length 5.0 cm.

Which statement about the image formed by the lens is correct?

Light travels through air and then enters and travels through a parallel-sided glass block.
Which statement is correct?

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?

Which diagram shows the pattern and the direction of the magnetic field lines around a bar magnet?

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

In which experiments is the magnet demagnetised?

Which row shows the meaning of the quantity e.m.f. and the unit in which it is measured?
[Table_1]

Which diagram shows the current-voltage ($I - V$) characteristic for a filament lamp?

The diagram shows a light-dependent resistor (LDR) connected in a potential divider circuit.
The brightness of the light falling on the LDR is increased.
Which row shows what happens to the resistance of the LDR, and what happens to the reading on the voltmeter?
[Table_1]

The diagram shows part of an electric circuit. The reading on the voltmeter is 16V. The current in the resistor is 8.0A.

One coulomb of charge flows from P to Q through the resistor. How much energy is transferred in the resistor?

Which symbol represents an AND gate?

Either a fuse or a circuit-breaker can be used to protect electrical cables from large currents that could cause overheating.
[Image_1 showing an electrical circuit with X and Y positions]
When a fuse is used, where should it be connected, and when a circuit-breaker is used, where should it be connected?

The circuit diagram shows an a.c. power supply connected to two diodes and a resistor.
The graph shows the current from the supply.
Which graph shows the current in diode X?

A 100% efficient step-down transformer has primary voltage $V_p$ and primary current $I_p$.
Which row compares the secondary voltage with $V_p$ and the secondary current with $I_p$?
[Table_1]

There is an electric current in a wire. The wire is placed in a magnetic field. A force acts on the wire due to the current.
Which statement is correct?

Which diagram represents the structure of a neutral atom?

A nucleus of $^{228}_{88}\text{Ra}$ decays into an isotope of actinium, which then decays into a nucleus of $^{228}_{90}\text{Th}$.
What types of radiation have been emitted during 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 due to a sample of a radioactive isotope is measured for 80 minutes.
[Table_1]
What is the half-life of the isotope?