Edexcel GCSE Combined Science Paper 6: Physics 2 Foundation June 2018 question paper 1SC0/2PF

Complete the following sentences using one of the phrases from the box below.

Electrical power is generated at

Electricity is transmitted over long distances by transmission lines that are part of

Electricity is transmitted at high voltages so that

Which statement is true for transformers?

In a small transformer

● the primary voltage is 230 V

● the primary current is 0.020 A

● the secondary voltage is 5.0 V

Calculate the secondary current.

Use the equation

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

Figure 1 shows the magnetic field produced by a current in a long, straight wire.

Which row of the table is correct when the strength of the magnetic field is greatest?

Which of these materials would be the most suitable for making a temporary magnet?

Figure 2 shows a magnet holding some paper clips.

Describe how a student could show that the paper clips are induced magnets.

Describe how you could show that the Earth has a magnetic field.

A student uses a compass to investigate the magnetic field near a bar magnet.

The student places the compass near the bar magnet as shown in Figure 3.

Figure 3

Mark the north pole of the bar magnet with an ‘N’ in Figure 3.

State two ways in which the investigation could be developed to show the shape of the magnetic field around the bar magnet.

You may add to Figure 3 to help with your answer.

Which of these forces keeps the Moon moving around the Earth?

Which of these is a scalar quantity?

Figure 4 shows a box at rest on a floor.

The force that the floor exerts on the box is shown by the vector in Figure 4.

Figure 4

Add another vector to the diagram in Figure 4 to show the weight of the box.

Figure 5 shows part of a cart.

When the wheels turn the axles become warm.

Explain why the axles become warm when the wheels turn.

Give one way of reducing the heating of the axles when the wheels turn.

Complete the equation that relates efficiency, useful energy transferred by a device and total energy supplied to the device.

In one second an engine has a total energy input of 7500 J.

In one second 3200 J is transferred to the surroundings as wasted energy.

Calculate the useful energy transferred by the engine.

useful energy transferred =_........ J

Calculate the efficiency of this engine.

efficiency of the engine =_........

Figure 6 shows a graph of current against potential difference for an electrical component.

Which electrical component will show this variation of current with potential difference?

A lamp is connected to a potential difference of 0.24 V.

The current in the lamp is 0.12 A.

Calculate the power of the lamp.

Use the equation

P = I × V

power of the lamp =_........ W

The potential difference is changed to 0.30 V. The current in the lamp is now 0.13 A.

The lamp is switched on for 35 s.

Calculate the energy that is transferred in this time. Select an equation from the list of equations at the end of this paper.

energy transferred =_........ J

The current in the lamp stays at 0.13 A.

Calculate the charge that flows through the lamp in 35 s. Use the equation

Q = I × t

charge =_........ C

A student measures the current in the lamp for several values of potential difference across the lamp.

Figure 7 shows the student’s results.

The student uses the results in Figure 7 to write this conclusion.

‘ As the potential difference across the lamp increases, the current in the lamp increases and the relationship is directly proportional.’

Comment on the student’s conclusion.

A student uses the apparatus in Figure 8 to determine the specific heat capacity of water.

State the measurements needed to calculate the specific heat capacity of water.

State two ways that the apparatus could be adapted to improve the procedure.

The student decides to measure the temperature of the water every minute while it is being heated.

Figure 9 shows a graph of the student’s results.

Predict the temperature of the water if the heating continues up to 8 minutes.

temperature of the water =_........ °C

Another student decides to melt some ice.

The student melts 380 g of ice at 0 °C.

The specific latent heat of fusion of ice is 3.34 × 10⁵J/kg.

Calculate the thermal energy needed to melt the ice.

Select an equation from the list of equations at the end of this paper.

thermal energy needed =_........ J

The volume of 380 g of ice is 410 cm³.

Calculate the density of the ice in g/cm³.

density =_........ g/cm³

A cyclist is riding a bicycle at a steady velocity of 12 m/s.

The cyclist and bicycle have a total mass of 68 kg.

Calculate the kinetic energy of the cyclist and bicycle.

Use the equation

kinetic energy =_........ J

Describe the energy transfers that happen when the cyclist uses the brakes to stop.

The cyclist starts to cycle again.

The cyclist does 1600 J of useful work to travel 28 m.

Calculate the average force the cyclist exerts.

average force =_........ N

*(d) A class of students investigate the power output of each student in the class.

The class must decide whether they use a method using steps or a method using weights. The whole class must use the same method.

Plan what measurements the students should take and how these can be used to calculate and compare the power output of each student.

You may draw a diagram to help with your plan.