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Please help me out for solving the problem..........

Please help me out for solving the problem..........

Question Image
Grade:12th pass

1 Answers

Arun
25763 Points
3 years ago
Dear student
 
U = ½ * L * i^2
P = i^2 * R
now
L = 2 U / i^2
and
R = P / i^2
time constant \phiL = L / R = 2U /P
hence option 3 is correct
 

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