Electricity in the Home (Paper 1)

Question 1

What is the purpose of a domestic electricity meter?

Answer 1

A domestic electricity meter measures how much energy is supplied.

Question 2

What is an equation to calculate energy transferred?

Answer 2

An equation to calculate energy transferred is E=Pt
When E is energy transferred, P is power and t is time.

Question 3

What is an equation to calculate useful energy used?

Answer 3

Useful energy used = efficiency x energy supplied.