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21 August, 06:08

A lightbulb consumed 1100J in 30 minutes. Find Power, resistance, and calculate energy in kWh

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  1. 21 August, 06:33
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    30 minutes is 1800 seconds.

    Power = energy / time

    P = 1100 J / 1800 s

    P = 0.611 W

    Converting the energy from J to kWh:

    1100 J * (1 Ws / 1 J) * (1 kW / 1000 W) * (1 h / 3600 s) = 3.06*10⁻⁴ kWh

    To find resistance, you need to be given either the voltage or the current.
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