How much power does the motor develop at 20 mA at 100 V?

Given:

I = 20 mA (milliampere) – the strength of the electric current in the motor winding;

U = 100 Volts – voltage of the electrical network.

It is required to determine W (Watt) – engine power.

We translate the units of measurement of the current strength into the SI system:

I = 20 mA = 20 * 10-3 = 20/1000 = 0.02 Ampere.

Then, to determine the power of the electric motor, you must use the following formula:

W = I * U = 0.02 * 100 = 2 watts.

Answer: the power developed by the electric motor is 2 watts.