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NEET 2018 · Inductors & DC Transients (Mixed)

Inductors & DC Transients (Mixed) question from NEET 2018

Q22NEET 2018Easy

Inductors & DC Transients (Mixed)

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance

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Answer: (d)

  1. U=12LI2⇒L=2UI2U = \frac{1}{2}LI^2 \Rightarrow L = \frac{2U}{I^2}
  2. L=2(25×10−3)(60×10−3)2=0.053.6×10−3=13.89 HL = \frac{2(25\times10^{-3})}{(60\times10^{-3})^2} = \frac{0.05}{3.6\times10^{-3}} = 13.89\text{ H}
  3. So the answer is (d) 13.89 H.
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