An emf of 20 V is applied at time to a circuit containing in series 10 mH inductor…

PHYSICS · Single correct · ISC · Physics · Electromagnetic Induction and Alternating Currents · Electromagnetic Induction and Alternating Currents

Problem

An emf of 20 V is applied at time

t = 0

to a circuit containing in series 10 mH inductor and 5

\Omega

resistor. The ratio of the currents at time

t = \infty

and at

t = 40

s is close to: (Take

e^2 = 7.389

) (1) 1.06 (2) 1.15 (3) 1.46 (4) 0.84