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JEE Main 2021 (17 Mar, Shift 2) · Pure R, L and C Circuits

Pure R, L and C Circuits question from JEE Main 2021 (17 Mar, Shift 2)

Q55JEE Main 2021 · 17 MAR · SHIFT 2Easy

Pure R, L and C Circuits

What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved?

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Answer: (d)

  1. XL=2πfL∝fX_L = 2\pi fL \propto f: halving ff halves XLX_L.
  2. I=VXLI = \frac{V}{X_L}: halving XLX_L doubles II.
  3. So the answer is (d).
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