The winding of the electric drill has a resistance of 20 ohms. What voltage should

The winding of the electric drill has a resistance of 20 ohms. What voltage should be supplied to the electric drill if it is designed for a current of 19 A?

Given:

R = 20 ohms;

I = 19 A.

To find:

U-?

Solution:

To find the voltage, we use the formula: I = U / R, where I is the current strength, U is the voltage, R is the resistance;

From the formula above, we deduce the voltage U = I * R = 19 * 20 = 380 V;

Answer: Resistance 380 V must be connected to the electric drill.