Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. IGCSE
  3. Physics Edexcel
  5. Question bank

Mains electricity

EasyMediumHard
12345678910111213141516171819202122232425262728
Question 4

This question is about domestic electricity.

a.

The diagram shows four common electrical circuit symbols.

Four electrical circuit symbols labeled A, B, C, and D.

Which symbol represents a fuse?

  • A
  • B
  • C
  • D
[1]
b.

Which symbol represents a light dependent resistor (LDR)?

  • A
  • B
  • C
  • D
[1]
c.

A high-power hairdryer connected to the mains electricity supply has a power rating of 2000 W2000\text{ W}2000 W.

State the equation linking power, current, and potential difference (voltage).

[1]
d.

Show that the current in the heating element of the hairdryer is approximately 8.7 A8.7\text{ A}8.7 A when connected to a 230 V230\text{ V}230 V mains supply.

[3]
e.

Which of these fuses should be used with this hairdryer?

  • A: 3 A3\text{ A}3 A
  • B: 5 A5\text{ A}5 A
  • C: 8 A8\text{ A}8 A
  • D: 13 A13\text{ A}13 A
[1]
f.

Explain how the fuse protects the hairdryer and the user when the current in the appliance becomes too high.

[2]

Mains electricity Questions

  1. IGCSE
  2. /Physics
  3. /Mains electricity