Question

Assertion :The alternating current lags behind 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

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

When ac flows through an inductor current lags behind the emf., by phase of $\pi /2$ inductive reactance $X_L=\omega L=\pi .2f.L$ , so when frequency increases correspondingly inductive reactance also increases.