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AIIMS 2008
Exam
AIIMS
Year
2008
Subject
Physics
Chapter
Alternating Current

AIIMS 2008 · Physics · Alternating Current

Assertion : The alternating current lags behind the e.m.f. by a...

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.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

Assertion is correct but reason is false because inductance reactance XL=2πfLX_L=2 \pi f L. So, higher frequency greater inductance reactance.
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