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

This question is about electrical circuits.

Draw one straight line from each circuit symbol to its description.

Figure 1 shows a lamp in a circuit.

The lamp is switched on.

The current in the lamp is a flow of

The current in the lamp is 0.21 A.

Calculate the charge that flows through the lamp in a time of 300 s.

State the unit of charge.

Use the equation

charge = current × time

charge =_........ unit_........

A teacher prepares some equipment to demonstrate electromagnetism. Figure 2 shows the equipment.

The teacher wants to show that iron filings

• are picked up by the metal rod when the switch is closed

• fall off the metal rod when the switch is opened again.

Suggest a suitable metal for the rod.

Give two reasons for your choice.

A student’s mobile phone has an app to measure a magnetic field.

The student places the phone on a table and rotates the phone until it is pointing north.

There are no magnets near to the phone.

Figure 3 shows the display on the screen of the phone.

(Source: adapted from MGS Lite app for iPhone)

Figure 3

State why the strength of the magnetic field shown is not zero.

The student places a magnet near to the phone on the table.

Figure 4 shows the magnet and the new display on the screen.

(Source: adapted from MGS Lite app for iPhone)

Figure 4

State two changes in the magnetic field measured by the phone from Figure 3 to Figure 4.

Describe how the student could use the mobile phone to investigate the strength of the magnetic field at different distances from the magnet.

An electric water pump is powered by the 230 V mains supply.

Figure 5 shows the inside of the plug on the cable to the pump.

One wire in the plug is the earth wire.

The other two wires are

Describe the purpose of the component labelled X.

The 230 V mains supply transfers 9000 J of energy to the pump motor in 1 minute.

Calculate the current in the pump motor.

Use the equation

current =_........ A

The system transfers 8400 J of useful kinetic energy to the water passing through the pump in 1 minute.

Figure 6 shows a diagram of the energy transfers.

Explain why the useful energy transferred to the water is different from the total energy supplied to the pump.

Calculate the efficiency of the pump.

Use the equation

efficiency =_........

Three students carry out an investigation to determine their powers when running up stairs.

Figure 7 shows a diagram of the stairs with four distances, A, B, C and D, marked.

The students need to calculate the work done against gravity.

Which distance should be used in the calculation?

They take turns to run up the stairs and use a stopwatch to measure the time taken.

The students estimate their own weight.

Figure 8 shows a table of their results.

The table is not complete.

State the unit for work done.

unit for work done is_........

Use the data for student B to calculate his estimated weight.

weight =_........ N

Use the data for student C to calculate the time she takes.

time taken =_........ s

Use the data for all three students to calculate the average power of the students.

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

Identify a significant source of error in the investigation and state how this error can be reduced.

source of error

can be reduced by

Figure 9 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 10.

The power supply provides the same potential difference as it provided in the circuit in Figure 9.

State and explain the difference between the brightness of the lamp in Figure 9 and the brightness of a lamp in Figure 10.

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.

Describe the difference between direct current (d.c.) and alternating current (a.c.) in electrical circuits.

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 11 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.

*(d) A student needs to determine the specific heat capacity of water.

Figure 12 shows some of the equipment the student uses.

Describe the method the student should use to determine the specific heat capacity of water.

Your description should include, with reasons,

• any other equipment needed

• the measurements needed.

You may draw a diagram if it helps your answer.