Home
Class 12
PHYSICS
A battery of emf E and of negligible int...

A battery of emf `E` and of negligible internal resistance is connected in a `L-R` circuit as shown in figure. The inductor has a piece of soft iron inside it. When steady state is reached in the piece of soft iron is abruptly pulled out suddenly so that the inductance of the inductor decreases to `nL` with `nlt1` with battery remaining connected. Calculate.

a. Current as a function of time assuming `t=0` at the instant when piece is pulled.
b. the work done to pull out the piece.
c. thermal power generated in the circuit as as function of time.
d. power supplied by the battery as a function of time.
HOW TO PROCEED When the inductance of an inductor is abruptly changed, the flux passing through it remains constant.
`phi =` constant
`:. Li =` constant `(L = (phi)/(i))`

Promotional Banner

Similar Questions

Explore conceptually related problems

A 3 V battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I in the circuit will be

A_(3) volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current (1) in circuit will be

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I in the circuit will be :

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be

A battery of emf E and internal resistance r is connected to a variable resistor R as shown in figure. Which one of the following is true ?

A solenoid of resistance R and inductance L has a piece of soft iron inside it. A battery of emf E and of negligible internal resistance is connected across the solenoid as shown in Fig. At any instant, the piece of soft iron is pulled out suddenly so that inductance of the solenoid decrease to etaL(eta lt 1) with battery remaining connected. Power supplied by the battery as a function of time

A solenoid of resistance R and inductance L has a piece of soft iron inside it. A battery of emf E and of negligible internal resistance is connected across the solenoid as shown in Fig. At any instant, the piece of soft iron is pulled out suddenly so that inductance of the solenoid decrease to etaL(eta lt 1) with battery remaining connected. The work done to pull out the soft iron piece is