Question

A coil has a resistance of 10Ω and inductance of 4 H. Calculate:
(a) the current across a 50V d.c. power supply.
(b) the energy stored by the coil when it is connected across a 50V d.c. power supply.

Answer 1

Answer:

The slope shows that the “Inductive Reactance” of an inductor increases as the supply frequency across it increases. Then we can see that at DC an inductor has zero reactance (short-circuit), at high frequencies an inductor has infinite reactance (open-circuit