JEE Main & Advanced
JEE Main Paper (Held On 12-Jan-2019 Morning)
question_answer
In the figure shown, a circuit contains two identical resistors with resistance \[R=5\Omega \] and an inductance with L=2mH. An ideal battery of 15 V is connected in the circuit. What will be the current through the battery long after the switch is closed?
[JEE Main Online Paper Held On 12-Jan-2019 Morning]
A)3 A
B)5.5 A
C)7.5 A
D) 6 A
Correct Answer:
D
Solution :
The coil offers zero resistance, after the switch is closed for a long time. \[I=\frac{V}{(R\times R)/(R+R)}=\frac{V\times 2R}{{{R}^{2}}}=\frac{V\times 2}{R}=6A\]