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Two inductors of inductance 5 mll and 15 mll are connected in series and a current...

Physics
JAMB 2010

Two inductors of inductance 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is?

  • A. 500.0J
  • B. 250.0J
  • C. 62.5J
  • D. 50.0J
  • E. no correct option
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Correct Answer: Option E
Explanation

Total inductance,L = L1 + L2 = m
15 + 5 = 20mH = (20)H/1000
1 = 5A
Energy of inductor, (1)/2 L I2
= (1)/2 X (20)/1000 X 5-2
= 0.25 J

There is an explanation video available below.


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Explanation Video

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