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Answer the following.1) In LCR series circuit, what is the condition for current resonance?2) A coil of self inductance \( 3 H \) carries a steady current \( 2 A \). What is the energy stored in the magnetic field of the coil?

Answer»

Given

L = 3H

i = 2A

Energy stored in coil U = 1/2 Li2

= 1/2 x 3 x (2)2

= 1/2 x 3 x 4

U = 6 J



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