question_answer

When the switch S, in circuit shown, is closed, then the value of current i will be:   [JEE Main Online Paper (Held On 09-Jan-2019 Morning]

A) 4 A   

B) 5 A   

C) 3 A   

D) 2 A

Correct Answer: B

Solution :

\[\frac{V-20}{2}\,\,+\,\,\frac{V}{2}\,\,+\,\,\frac{V-10}{4}\,\,\,=\,\,10\] \[2V\,-\,40\,+\,2V\,+\,V\,-\,10\,=0\] \[5V\,\,=\,\,10V\] \[I\,\,=\,\,\frac{V}{2}\,\,=\,\,5A\]