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JAMB Physics 2004 Question 27

Question 27

Electromagnetic Induction

The energy stored in an inductor of inductance 5mH when a current of 6A flows through it is

  1. A.1.8 × 10−2J.
  2. B.9.0 × 10−3J.
  3. C.1.4 × 10−2J.
  4. D.9.0 × 10−2J.
Show the answer and explanation

Answer: D (9.0 × 10−2J.)

Explanation

E = ½LI2 = ½ × 5 × 10−3 × 62 = 9.0 × 10−2 J.