Question

In an L-R circuit, time constant is that time in which
current grows from zero to the value​

Answer 1

Explanation:

63% I

0

current in RL circuit with time is given by,

i=i

o

(1−e

τ

−t

)

and one time constant is current when t=τ, i.e

i=i

o

(1−e

−1

)

which is 0.63i

o

.