Home
Class 12
PHYSICS
If the switch is closed for long time an...

If the switch is closed for long time and then open at `t = 0`, the P.D across indicator at `t = 0` is

A

`OV`

B

`50V`

C

`20V`

D

`100V`

Text Solution

Verified by Experts

The correct Answer is:
D
at steads state `5A` current through inductor hence P.D across indicator at `t=0" " 20xx5 = 100V`
Promotional Banner

Similar Questions

Explore conceptually related problems

The switch is closed for a long time and then opened at time t = 0. Find the initial voltage across L after t = 0, which end is at higher potential P or Q?

In Fig. switch S is closed for a long time. At t = 0 , if it is opened, then

In Fig. switch S is closed for a long time. At t = 0 , if it is opened, then

The switch S shown in figure is kept closed for a long time and is then opened at t = 0. Find the current in the middle 10Omega resistor at t=1.0ms

The switch S shown in figure is kept closed for a long time and is then opened at t=0 .Find the current in the middle 10(Omega) resistor at t=1.0ms .

In the circuit shown in the figure, E = 50.0 V, R = 250 Omega and C = 0.500 muF. The switch S is closed for a long time, and no voltage is measured across the capacitor. After the switch is opened, the voltage across the capacitor reaches a maximum value of 150 V . What is the inductance L ?

In the circuit shown in figure, E = 120 V, R_1 = 30.0Omega, R_2 = 50.0 Omega and L=0.200H . Switch S is closed at t = 0 . Just after the switch is closed. (a) What is the potential difference V_(ab) across the inductor R_1 ? (b) Which point, a or b , is at higher potential? (c) What is the potential difference V_(cd) across the inductor L ? (d) Which point, c or d , is at a higher potential? The switch is left closed for a long time and then is opened. Just after the switch is opened (e) What is the potential difference V_(ab) across the resistor R_1 ? (f) Which point a or b, is at a higher potential? (g) What is the potential difference V_(cd) across the inductor L ? (h) Which point, c or d , is at a higher potential?

In figure, the switch is in the position 1 for long time, then the switch is shifted to position 2 at t=0 . At this instant the value of i_1 and i_2 are

Initially the 900muF capacitor is charged to 100 V and the 100muF capacitor is uncharged in the figure shown. Then the switch S_(2) is closed for a time t_(1) , after which it is opened and at the same instant switch S_(1) is closed for a time t_(2) and then opened. It is now found that the 100muF capacitor is charged to 300 V. If t_(1) and t_(2) minimum possible values of the time intervals, then findout (t_(1))/(t_(2))

Consider the situation shown in figure. The switch S is open for a long time and then closed. Find the heat developed in the system .