ElectroMagnetic InductionHard
Question
An LR circuit has L = 1 H and R = 1 Ω. It is connected across an emf of 2 V. The maximum rate at which energy is stored in the magnetic field is :
Options
A.1 W
B.2 W
C.1/4 W
D.4 W
Solution
U = 
LI2
= LI 
= RI02 (1 − e−t/τ)e−t/τ
is maximum when e−t/τ = 
or 
= 
= 10W.
LI2 = LI = RI02 (1 − e−t/τ)e−t/τ is maximum when e−t/τ = or = = 10W.Create a free account to view solution
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