Question

41.
An inductance L and a resistance R are joined to
a battery. After some time, battery is disconnected
but Land R remains connected to the closed circuit.
The current strength will be reduced to 37% of its
initial value in :
(1) RL sec
(2) R/L sec
(3) L/R sec
(4) 1/LR sec​

Answer 1

Answer:

Decay of current =i(t)=i

0

e

−Rt/L

0.37=e

−Rt/L

−Rt/L=ln(0.37)=−1

t=L/R sec