Question

When an inductor is connected to a 230V d.c source,a current of 2A passes through it.When the same inductor is connected to a 230V,50 Hz a.c source,the amount of current decreases (i.e, 1A ). Why?

Answer 1

Answer:

Impedance is added in case of AC source

Explanation:

Formula for calculating impedance in case of a conductor having conductance L is ;

Xl = 2 π f x L

Now in case of a DC source, f will be equal to O and hence Xl also becomes 0. When the impedance or resistance is less, then more current 2 A passes through the circuit. But incase of AC source with f = 50, then there will be some impedance added to the circuit which then reduces the overall current to 1 A