Calculate the current drawn from a generator having a voltage output of 420 V when connected to a motor having a power of 1800 W.

Power is the measure of how quickly an electric current does work. P stands for it. The watt is the SI unit of power (W).

Power dissipation comes from:

$Power\left(\mathrm{P}\right)=\mathrm{V}I=\frac{{\mathrm{V}}^2}{R}=I^2\mathrm{R}$

Where I is the current flowing, V is the potential difference across resistance, and R represents resistance

Given that:

Voltage V=420 V

Power W=1800 W

Electric power $P=V\times I$ 

$1800=420\times I$ 

current $I=\frac{1800}{420}= 4.2 A$

Therefore the current drawn from a generator is 4.2 A.