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7. Alternating current — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics7. Alternating current1 Mark
MCQ
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ?
  • A
    Both, inductive reactance and current will be halved.
  • ✓
    Inductive reactance will be halved and current will be doubled.
  • C
    Inductive reactance will be doubled and current will be halved.
  • D
    Both, inducting reactance and current will be doubled.
✓

Answer

Correct option: B.
Inductive reactance will be halved and current will be doubled.
b
$X _{ L }=\omega L$

$i =\frac{ v _{0}}{\omega L }$

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