How to 转换 energy in joules (J) to 电气 power in watts (W).
You can 计算 watts from joules and seconds, but you can't 转换 joules to watts, since joule and watt units represent different quantities.
The power P in watts (W) is equal to the energy E in joules (J), divided by the 时间 period t in seconds (s):
P(W) = E(J) / t(s)
So
watt = joule / second
or
W = J / s
求 the power consumption of an electrical circuit that has energy consumption of 90 joules for 时间 duration of 3 seconds
P(W) = 90J / 3s = 30W
