Question

A transformer supplies 60 watts of power to a device that is rated at 20 volts. The primary coil is connected to a 120-volt ac source. What is the current I1I1I_1 in the primary coil

Answer 1

Answer:

The current in the primary coil would be $0.5\ A$.

Explanation:

Given the power supplied by a transformer is 60 watts.

And the voltage in the primary coil is 120 Volts.

We need to find the current supply in the primary coil.

We will use the formula

$P=V\times I$

Where,

$P$ is the power in Watts.

$V$ is the voltage in Volts.

$I$ is the current supply in Ampere.

$I=\frac{P}{V}\\\\I=\frac{60}{120}\\ \\I=0.5\ A$

So, the current in the primary coil would be $0.5\ A$.