In the circuit shown here, the point ' C ' is kept connected to point A '' till the current…

In the circuit shown here, the point 'C' is kept connected to point A '' till the current flowing through the circuit becomes constant. Afterward, suddenly, point 'C' is disconnected from point A '' and connected to point 'B' at time t=0. Ratio of the voltage across resistance and the inductor at t=LR will be equal to :

          
  1. e 1 - e
  2. 1
  3. - 1
  4. 1 - e e

Solution

Applying Kirchhoff's law in closed loop,

-VR-VL=0

⇒ VR  VL =- 1
 
 

Asked in: JEE Main 2014 (06 Apr)

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