Question

As the frequency of the ac voltage across an inductor approaches zero, the inductive reactance of that coil

A)approaches zero.

B)approaches infinity.

C)approaches unity.

D)none of the given answers

Answer 1

The inductive reactance of a coil approaches infinity as the frequency of AC voltage across it approaches zero, due to the direct proportionality of reactance to frequency.

Step-by-step explanation:

As the frequency of the AC voltage across an inductor approaches zero, the inductive reactance of that coil approaches infinity.

Inductive reactance (XL), which is proportional to the frequency (f) of the AC voltage source and the inductance (L) of the coil, is given by the formula XL = 2πfL.

As the frequency approaches zero, the formula indicates that the inductive reactance approaches infinity, meaning the inductor behaves like an open circuit in a DC situation where frequency is zero.