A uniformly wound long solenoid of inductance and resistance is cut into two parts in…

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

Problem

A uniformly wound long solenoid of inductance

L

and resistance

R

is cut into two parts in the ratio

\eta:1

, which are then connected in parallel. The combination is connected to a cell of emf

E

. The time constant of the circuit is: (a)

\frac{L}{R}

(b)

\frac{L}{(\eta+1)R}

(c)

\left(\frac{\eta}{\eta+1}\right)\frac{L}{R}

(d)

\left(\frac{\eta+1}{\eta}\right)\frac{L}{R}