GCSE AQA Physics Current, Potential Difference & Resistance: Figure 5 shows part of a lightin

Question

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

**Figure 5**

Lamp

Neutral wire

Live wire

0.3.1 What is the frequency of the ac mains electricity supply in the UK?
Tick (✓) one box.

20 Hz

50 Hz

60 Hz

100 Hz

0.3.2 The mains electricity supply has an alternating potential difference.

Which diagram shows an alternating potential difference?
Tick (✓) one box.

0 V

0.3.3 The potential difference across the lamp is 230 V.
The current in the lamp is 0.020 A.
Calculate the power output of the lamp.
Use the equation:
power = potential difference × current

Power = ____________ W

0.3.4 The potential difference across the lamp is 230 V.
Calculate the energy transferred by the lamp when 180 C of charge flows through the lamp.
Use the equation:
energy transferred = charge flow × potential difference

Energy transferred = ____________ J

0.3.5 An electrician needs to replace the light switch in Figure 5.
Describe the possible hazard and the risk to the electrician of changing the light switch.

Hazard ________________

Risk ________________

Figure 5 shows part of a lighting circuit in a house - AQA - GCSE Physics - Question 3 - 2020 - Paper 1

Worked Solution & Example Answer:Figure 5 shows part of a lighting circuit in a house - AQA - GCSE Physics - Question 3 - 2020 - Paper 1

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

Which diagram shows an alternating potential difference?

Calculate the power output of the lamp.

Calculate the energy transferred by the lamp when 180 C of charge flows through the lamp.

Describe the possible hazard and the risk to the electrician of changing the light switch.

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