question_answer

In the circuit shown,                                            [JEE Main 11-Jan-2019 Morning]

the switch \[{{S}_{1}}\] is closed at time t = 0 and the  switch\[{{S}_{1}}\]is opened and \[{{S}_{2}}\] is closed. The behavior of the current I as a function of time ‘t’ is given by

A)

B)

C)

D)

Correct Answer: A

Solution :

[a]: Initially, when the switchis closed the current increases and when the switch is closed the current starts decreasing exponentially i.e., according to .

So, the behaviour of the current can be depicted from the following graph:

*As per official answer key.

Value is not specified hence a, b and c may be correct option.