Domestic Uses and Safety (3)

Question 1

If the electrician touches the live wire he will receive an electric shock.
Explain why

Answer 1

As the potential of the live wire is 30 V and the potential of the electrician is 0 V so there is a large potential difference between the live wire and electrician and so charge passes through his body

Question 2

Describe the action and purpose of a solar panel

Answer 2

Water by heated by radiation from the Sun is used to heat buildings

Question 3

One of the axes on Graph 1 has been labelled ‘Potential difference’.
What should the other axis be labelled?

Answer 3

Time

Question 4

State two other ways in which the maximum induced potential difference could be increased

Answer 4

1. Increased speed of coil
2. strengthen magnetic field