A solenoid of inductance `L` with resistance `r` is connected in parallel to a resistance `R`. A battery of emf `E` and of negligible internal resistance is connected across the parallel combination as shown in the figure. At time `t = 0`, switch `S` is opened, calculate
(a) current through the solenoid after the switch is opened.
(b) amount of heat generated in the solenoid.

Two batteries of E_(1) internal resistance r_(1) & emf E_(2) internal resistance r_(2) are connected in parallel and makes a battery system. An external resistance R is connected across this system as shown in the figure.

Two batteries of E_(1) internal resistance r_(1) & emf E_(2) internal resistance r_(2) are connected in parallel and makes a battery system. An external resistance R is connected across this system as shown in the figure.

A 10 V cell of negligible internal resistance is connected in parallel across a battery of emf 200 V and internal resistance 38 Omega as shown in the figure. Find the value of current in the circuit.

A series combination of L and R is connected to a battery of emf E having negligible internal resistance. The final value of current depeds upon

A series combination of L and R is connected to a battery of emf E having negligible internal resistance. The final value of current depends upon

A resistor R is conneted to a parallel combination of two identical batteries each with emf E and an internal resistance r. The potential drop across the resistance R is.

A resistor R is conneted to a parallel combination of two identical batteries each with emf E and an internal resistance r. The potential drop across the resistance R is.

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. Assume t = 0 is the instant when iron piece has been pulled out, the current as a function of time after this is

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