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(a) Derive the expression for the magnet...

(a) Derive the expression for the magnetic energy stored in an inductor when a current I develops in it. Hence, obtain the expression for the magnetic energy density.
(b) A square loop of sides 5 cm carrying a current of 0.2 A in the clockwise direction is placed at a distance of 10 cm from an infinitely long wire carrying a current of 1 A as shown in Fig. 6.66. Calculate (i) the resultant magnetic force, and (ii) the torque, if any, acting on the loop.

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The correct Answer is:
(b) (i) `1.33 xx 10^(-8) N, attractive (ii) zero
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U-LIKE SERIES-ELECTROMAGNETICE INDUCTION-Self Assessment Test Section -D
  1. (a) Derive the expression for the magnetic energy stored in an inducto...

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