GCSE|AQA|Physics P1F (Nov 2020)

Figure 1 shows how the National Grid connects power stations to consumers.

Name the parts of the National Grid labelled K, L and M respectively.

Figure 2 shows how the percentage of electricity generated by gas-fired power

stations changed in the UK over 5 years.

Calculate how many times greater the percentage of electricity generated by gas-fired

power stations was in 2018 than in 2014.

Explain one environmental effect of generating electricity using a gas-fired power

station.

The UK government wants more electricity to be generated using renewable energy

resources.

What is a renewable energy resource?

• An energy resource that can be burned

• An energy resource that can be recycled

• An energy resource that can be replenished quickly

• An energy resource that can be reused

An offshore wind farm is a group of wind turbines that are placed out at sea.

Figure 3 shows the power output of an offshore wind farm compared with a wind farm on land for a 24-hour period.

Give two advantages of the offshore wind farm compared with the wind farm on land.

Use information from Figure 3.

Riders of the AquaShute sit on a sled and move down a slide.

There is a layer of water between the sled and the slide.

How does the layer of water affect the friction between the sled and the slide?

• The friction is decreased

• The friction is increased

• The friction is not affected

The mass of one rider is 62.5 kg.

The height of the slide is 16.0 m.

gravitational field strength = 9.8 N/kg

Calculate the gravitational potential energy of the rider at the top of the slide.

Use the equation:

gravitational potential energy = mass × gravitational field strength × height

Gravitational potential energy_______

At the bottom of the slide the speed of the rider is 12 m/s.

The mass of the rider is 62.5 kg.

Calculate the kinetic energy of the rider at the bottom of the slide.

Use the equation:

kinetic energy = 0.5 × mass × (speed)²

When a rider reaches the bottom of the slide, the sled decelerates and stops.

Give two factors that will affect how far the sled will move before it stops.

Figure 5 shows part of a lighting circuit in a house.

What is the frequency of the ac mains electricity supply in the UK?

• 20Hz

• 50Hz

• 80Hz

• 100Hz