Home
Class 12
PHYSICS
Time constant of LR circuit will be...

Time constant of LR circuit will be

A

`(L)/(R )`

B

`(2L)/(R )`

C

`(L)/(2R)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C

Equivalent circuit
Re `q = R + (2R xx 2R)/(4R) = 2R`
`:.` time constant `t = (L)/(reg) = (L)/(2R)`
Promotional Banner

Similar Questions

Explore conceptually related problems

The time constant of L-R circuit is doubled if

The time constant of an LR circuit is 40 ms. The circuit is connected at t= 0 and the steady state current is found ot be 2.0 A. Find the current at (a) t= 10 ms (b) t =20ms, (c ) t =100ms and (d) t = 1 s.

A charged capacitor is discharged through a resistance. The time constant of the circuit is eta . Then the value of time constant for the power dissipated through the resistance will be

The time constant of C-R circuit is

The time constant for LR circuit between the terminals a and b as shown in diagram is

What is meant by the time constant of an LR circuit? When the current flowing through a coil P decreases from 5 A to 0 in 0.2 seconds, an emf of 60 V is induced across the terminals of an adjacent coil Q. Calculate the coefficient of mutual inductance of the two coils P and Q.

In the transient circuit shown, the time constant of the circuit is :

Find time constant of the circuit when (a) S is closed . (b) S is open.

The figure shows an experimental plot discharging of a capacitor in an RC circuit. The time constant of this circuit lies between:

Time constant of a C-R circuit is 2/(ln(2)) second. Capacitor is discharged at time t=0 . The ratio of charge on the capacitor at time t=2s and t=6s is