Energy Over Time - Electronic Circuits II Step by Step

A power value over a time interval gives an exact energy transfer. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Use the checked power

The circuit power is 24 watts.

P = 24\ \text{W}

Multiply by time

For 5 seconds, the energy transfer is 120 joules.

E = P t = 24\ \text{W}\cdot 5\ \text{s} = 120\ \text{J}