Question

A d, c motor consumes 47.25MJ when connected to a 250 V supply for 1 hour 45 minutes. Determine the power rating of the motor and the current taken from the supply

Answer 1

We know that

Power

$P=\frac{W}{t}$

$P=\frac{47.25\times10^6}{6300}=7500W$

Now we know that

$P=iV$

$I=\frac{P}{V}=\frac{7500}{250}=30A$