Edexcel GCSE Combined Science Paper 6: Physics 2 Higher November 2021 question paper 1SC0/2PH

Figure 1 shows the results from an experiment where the potential difference (voltage) across a filament lamp was varied.

The current and voltage were measured.

Describe the relationship between the current and the voltage as shown in the graph in Figure 1.

Use the values of the voltage and current at point P and at point Q on the graph in Figure 1 to complete the table in Figure 2.

Calculate the resistance of the filament lamp when the voltage is 4.5 V and the current is 51 mA.

Use the equation

resistance =_........ Ω

Explain why the resistance of the filament lamp changes as the voltage across it increases.

Describe, in terms of particles, two differences between a solid and a liquid of the same substance.

Figure 3 shows the dimensions of a solid block of concrete.

Density of concrete, ρ, = 2100 kg / m³.

Calculate the mass of the concrete block.

Use the equation

m = ρ × V

mass of concrete block =_........ kg

Figure 4 shows a shed made mostly of concrete blocks.

State two practical ways to reduce heat loss from this shed.

On a very cold day, the temperature of the air is −4 °C.

Calculate the value of this temperature on the kelvin scale.

temperature =_........ K

A student uses plotting compasses to investigate the magnetic field between the poles of two bar magnets.

Figure 5 shows one of the plotting compasses and one of the bar magnets.

The student places the two magnets on a piece of paper with a pole of one magnet a few centimetres away from a pole of the other magnet.

The student places 20 plotting compasses on the paper near the magnets.

Figure 6 shows the direction in which each of the plotting compasses points.

Figure 6

Draw two rectangles on Figure 6 to show the positions of the two bar magnets.

Label the N-pole and the S-pole of each magnet.

The student wants to determine the shape of the magnetic field for a larger area around the magnets.

Describe how the student should continue the investigation using just one plotting compass.

Two long, thin magnets are held with their N-poles facing each other. The force, F, between the magnets can be calculated using the equation

where K is a constant value d is the distance between the magnets.

The magnets are 4.0 cm apart.

The force between the magnets is 1.2 N.

Calculate the value of K.

State the unit.

K =_........ unit_........

The magnets are held the same distance apart but with the N-pole of one magnet now facing the S-pole of the other magnet.

The value of K does not change.

State how the force would compare with the force in part (i).

Two cyclists ride on a hilly road and go through points P, Q, R and S.

The diagram in Figure 7 shows how the vertical height of the road changes during the journey from P to S.

The greatest overall change in gravitational potential energy for each cyclist is between which two points on the journey?

The total weight of one cyclist and bicycle is 700 N.

Calculate the total amount of work done against gravity when the cyclist travels from point P to point Q in the journey.

work done =_........ J

The gravitational potential energy of the other cyclist changes by 11 250 J when travelling from point Q to point R.

Calculate the mass of this cyclist.

Gravitational field strength = 10 N / kg

Use the equation

∆ GPE = m × g × ∆ h

mass =_........ kg

Explain why the total amount of work done by a cyclist between points Q and R is different from the change in gravitational potential energy of the cyclist between points Q and R.

The cyclists lubricated the chains and the wheel bearings of their bicycles before setting off.

Lubricating the chains and wheel bearings helps to

The kinetic energy of another cyclist is 2800 J.

The mass of the cyclist is 85 kg.

Calculate the velocity of this cyclist.

Use the equation

velocity =_........ m / s

A technician investigates different electrical devices that are used in a car.

The technician connects a device to the 12 V car battery.

The technician measures the current in the circuit and the potential difference (voltage) across the device.

Figure 8 shows the car battery and the device that is being tested.

Draw on Figure 8 to show how the circuit should be completed so that the current in the circuit and voltage across the device can be measured.

The technician tests a headlamp.

The current in the headlamp is 4.8 A when connected to the 12 V battery.

Calculate the power supplied to the headlamp.

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

The technician tests an interior light.

The current in the interior light is 600 mA when connected to the 12 V battery.

Calculate the energy transferred to the interior light in 7 minutes.

Use an equation selected from the list of equations at the end of the paper.

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

The technician connects four devices to the car battery.

Each device is connected to its own switch and its own fuse.

Figure 9 shows how the four devices, fuses and switches are connected.

The current in each device is shown next to the device.

Calculate the current in the wires to the battery when all the devices are switched on.

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

State how the overall resistance of the circuit changes when any one of the devices is switched off.

There is a current of 2.3 A in the radio when the radio is working correctly.

Which of these should the technician choose to protect the radio circuit?

Explain why the wires to the battery in a car are thicker than the wires that connect each device to its switch and its fuse.

An electric kettle contains 1.41 kg of water at 25 °C.

The kettle is switched on.

After a while, the water reaches boiling point at 100 °C.

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

Calculate the amount of thermal energy supplied to the water by the kettle. Give your answer to the appropriate number of significant figures.

Use an equation selected from the list of equations at the end of the paper.

energy supplied =_........ J

The kettle is kept switched on and the water continues to boil.

After a while, the mass of the water in the kettle has decreased to 1.21 kg.

The thermal energy supplied to the water during this time was 450 000 J.

Calculate the specific latent heat of vaporisation of water.

Use an equation selected from the list of equations at the end of the paper.

specific latent heat of vaporisation =_........ J / kg

*(b) This question is about determining the specific heat capacity of aluminium. An aluminium block is placed in boiling water as shown in Figure 10.

The piece of string is tied to the aluminium block so the block can be transferred from the boiling water to the cold water.

Describe how a student could use this apparatus, and any additional items needed, to determine the specific heat capacity of aluminium.

Your answer should include how the student would

• obtain the necessary measurements

• use the measurements to calculate the specific heat capacity of aluminium.