Assertion: The alternating current lags behined the e.m.f. by a phase angle of `pi//2`, when `AC` flows through an inductor.
Reason: The inductive reactance increases as the frequency of `AC` source decreases.

Options

A. If both the assertion and reason are true and reason is a true explantion of the assertion.
B. If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.
C. If the assertion is true but reason false
D. If both the assertion and reason are false.

Answer

C

Explanation

When ac flows through an inductor current lags behind the e.m.f. by phase of `pi//2`, inductive reactance, `X_(L)= omegaL=pi2f.L`, so when frequency increases correspondingly inductive reactance also increases.