Question

oules to three significant Calculate the energy transferred by an appliance using mains electricity (230V) if the charge is 150C. Give your answer in kilojoules to three significant figures.

Answer 1

The energy transferred by the appliance using mains electricity is 17.3 KJ

Data obtained from the question

• Potential difference (V) = 230V
• Charge (Q) = 150 C

• Energy (E) =?

How to determine the energy transferred

The energy transferred can be obtained as follow:

E = ½QV

E = ½ × 150 × 230

E = 75 × 230

E = 17250 J

Divide by 1000 to express in kilojoules

E = 17250 / 1000

E = 17.3 KJ

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