Please help me out for solving the problem..........
Shaily , 7 Years ago
Grade 12th pass
Electromagnetic Induction> Please help me out for solving the proble...
1 Answers
Arun
Dear student
U = ½ * L * i^2
P = i^2 * R
now
L = 2 U / i^2
and
R = P / i^2
time constant 
L = L / R = 2U /P
hence option 3 is correct
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