| Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). |
| Mark the correct choice as: |
| Assertion [A]: The AC Lags behind the e.m.f. by a phase angle of \[\pi /2\], when AC flows through an inductor. |
| Reason (R): The inductive reactance increases as the frequency of AC source decreases. |
A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]
B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]
C) Assertion [A] is true but Reason (R) is false
D) Assertion [A] is false and Reason (R) is also false
Correct Answer: C
Solution :
(c) When AC flows through an inductor current lags behind the e.m.f. by phase of n/2, inductive reactance \[{{X}_{L}}=\omega L=2\pi vh\], so when frequency increases correspondingly inductive reactance also increases.
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