Elevise
  • Home
  • GCSE Maths
  • GCSE Science
  • Membership
Back to AQA Physics Paper 1 Specimen (set 1) Home

Paper 1 H - SAMPLE SET 1 Q13

13) An electrician is replacing an old electric shower with a new one.
​The inside of the old shower is shown in Figure 19.
Picture
13.1) If the electrician touches the live wire he will receive an electric shock.
​Explain why. [4 marks]

Different electrical wires need to have a cross-sectional area that is suitable for the power output.
​Figure 20 shows the recommended maximum power input to wires of different cross-sectional areas.
Picture
13.2) The new electric shower has a power input of 13.8 kW.
Determine the minimum diameter of wire that should be used for the new shower.
​The diameter, d, can be calculated using the equation:
Picture
A is the cross-sectional area of the wire. [2 marks]

​Minimum diameter = _________ mm
​
13.3) The charge that flows through the new shower in 300 seconds is 18 000 C. The new electric shower has a power of 13.8 kW.
Calculate the resistance of the heating element in the new shower.
Write down any equations you use. [5 marks]
​
Resistance = __________ Ω
​​
(Total for Question 13 = 11 marks)
Show Answers
Home
GCSE Maths
GCSE Science
Membership
UNITED KINGDOM
INFO@ELEVISE.CO.UK
  • Home
  • GCSE Maths
  • GCSE Science
  • Membership