GCSE Physics

Electricity Bills

On the last page, we worked out that the meter below reads 68,232·0 kWh
electricity meter with dials in kWh
Let us work out what the bill would be if, a year earlier, the meter had read 64,822·5 kWh. Assume each unit of electricity costs £0.08.

Number of units used = 68,232·0 - 64,822·5 = 3,409·5 kWh

Total cost = £0.08 × 3,409·5 = £272.76

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