JEE Main · 2023 · 30 Jan 2023 · Shift 1 · Current Electricity

In the following circuit, the value of

2 I_{1}

(twice the magnitude of the current

I_{1}

) is ______ A.

Answer: 3

Solution

Taking the bottom node as the reference and applying Kirchhoff's current law at the two free nodes with the

2 V

and

5 V

cells and the

1 Ω

and

2 Ω

resistors, the branch carrying

I_{1}

carries

\frac{3}{2}

of an ampere, so

I_{1} = 1.5 A

and

2 I_{1} = 3 A

JEE Main · 2023 · 30 Jan 2023 · Shift 1 · Integer answer