Edexcel GCSE Combined Science Paper 6: Physics 2 Higher June 2022 question paper 1SC0/2PH

Figure 1 shows a lamp connected to a d.c. power supply.

The power supply provides a potential difference (voltage) of 4.5 V.

The current in the lamp is 0.30 A.

Calculate the resistance of the lamp.

Use the equation

resistance =_........ Ω

Calculate the power supplied to the lamp.

power =_........ W

Another identical lamp is added to the circuit, as shown in Figure 2.

The power supply provides the same potential difference as it provided in the circuit in Figure 1.

State and explain the difference between the brightness of the lamp in Figure 1 and the brightness of a lamp in Figure 2.

A student is given a low voltage power supply and 1 m of resistance wire.

The student uses these and other pieces of equipment to measure the resistance of just 50 cm of the resistance wire.

Draw a diagram of the circuit that the student should use.

Your circuit diagram should identify the pieces of equipment that the student uses.

When water boils and turns into steam, there are changes in the arrangement of particles and the density.

Which of these shows the changes?

Figure 3 shows some water in a measuring cylinder and a lump of iron.

The lump of iron is lowered fully into the water.

The water level in the measuring cylinder rises to 530 cm³.

The density of iron is 7.9 g / cm³.

Calculate the mass of the lump of iron.

Use the equation

Give your answer to 2 significant figures.

mass =_........ g

A piece of wood has a similar shape and volume to the lump of iron.

The density of the wood is 0.82 g / cm³.

The density of water is 1.00 g / cm³

Explain why the method used in part (b) cannot be used to determine the mass of the piece of wood.

Describe what happens when a substance experiences sublimation.

Figure 4 shows the shape of the magnetic field near a bar magnet.

Figure 4

Draw arrows on the field lines in Figure 4 to show the direction of the magnetic field.

Place a letter X on Figure 4 at a place where the magnetic field is strongest.

Describe two differences between the magnetic field shown in Figure 4 and a uniform magnetic field.

State how a uniform magnetic field may be obtained in a school laboratory.

Figure 5 shows the directions of some plotting compass needles placed at different points near the Earth’s surface.

Figure 5

Sketch, on Figure 5, the Earth’s magnetic field outside and inside the Earth.

State which part of the Earth generates its magnetic field.

A wire is placed at right angles to the Earth’s magnetic field.

The wire is 0.600 m long and carries a current of 93.1 mA.

The force on the wire is 1.11 × 10⁻⁵N.

Calculate the magnetic flux density of the Earth’s magnetic field.

Use the equation

F = B × I × l

magnetic flux density =_........ T

Calculate the change in gravitational potential energy of the rover as it descends from position P to position Q.

Mass of rover = 1100 kg

Gravitational field strength on Mars = 3.7 N / kg

Give your answer to 2 significant figures.

change in gravitational potential energy =_........ J

Use data from Figure 6 to calculate the change in kinetic energy of the rover as it descends from position P to position Q.

change in kinetic energy =_........ J

The rover is slowed down safely using thrusters and a parachute (not shown in Figure 6).

The thrusters use jets of gas to control movements and the parachute is designed to be used in the atmosphere of Mars.

Describe the energy changes involved in terms of the work done by various forces as the rover descends.

The rover uses solar panels for its power needs.

The solar panels can provide 1200 W of power.

Show that the solar panels can provide 2.16 MJ of energy in 30 minutes.

The solar panels convert 27% of the energy they receive from the Sun into electricity.

Calculate the solar energy received by the panels that provides the 2.16 MJ of energy.

energy received =_........ J

Which of these shows the correct circuit symbol for a thermistor?

A student investigates how the resistance of a thermistor varies with temperature.

Figure 7 shows a graph of the results of this investigation.

Describe how the resistance of this thermistor varies with temperature.

Draw the tangent to the curve at a temperature of 30 °C, to find the rate of change of resistance with temperature at 30 °C.

State the unit.

rate of change of resistance with temperature at 30 °C =_........ unit_........

Figure 8 shows the apparatus used for this investigation.

Explain one improvement in measurement that the student could make in the investigation.

In this investigation, the resistance can be measured in two ways.

Method 1 – use an ohmmeter.

Method 2 – use an ammeter and a voltmeter.

Method 1
Method 2

using an ohmmeter
using an ammeter and voltmeter

Figure 9

Explain why method 2 gives more precise results than method 1.

Explain the difference between the term ‘specific heat capacity’ and the term ‘specific latent heat’ when applied to heating substances.

Figure 10 shows some apparatus that may be used to determine the specific heat capacity of water.

A student measures the initial temperature of the water.

The power supply is switched on for 10 minutes and then switched off.

Explain how the student should then obtain an accurate reading for the final temperature of the water, to be used in the calculation of the specific heat capacity.

*(c) A container of gas is at room temperature.

The gas is then heated.

The volume of the container remains the same.

By considering changes in velocities of the gas particles, explain how the temperature increase affects

• the average kinetic energy of the particles

• the pressure the particles exert on the walls of the container.

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