Question

How to get reactance of an.inductor in dc circuits?

Answer 1

When an Inductor is connected to a circuit with Direct Current (DC) source, two processes, which are called "storing" and "decaying" energy, will happen in specific conditions.

The Inductor is connected to the DC Power Supply, Figure 3. The sudden increase of current in the Inductor produces an Self Induced Electromotive Force, vemf, opposing the Current change, Figure 1. This appears as a Voltage across the Inductor, vL = - vemf. This - vemf will slow down the Current change, and in turn, the slow down of the Current change, will make vL become smaller. When the Current becomes stable, the Inductor creates no more opposition and vL becomes zero, the Storage Phase is over