In the circuit shown, if we connect a source of 2 volt with internal resistance of 1 Ω at AA′ with positive terminal at A′, then the current through R is

Question

Question

This question was previously asked in

UKPSC JE Electrical 2013 Official Paper II (Held on 7 Nov 2015)

Answer 1

Calculation:

F1 Raviranjan 13-1-22 Savita D16

When source voltage is applied then

F1 Reported Raviranjan 21-2-22 Savita 1

Applying source transformation in the current source

F1 Raviranjan 13-1-22 Savita D18

Applying Nodal Analysis

\(\rm \frac{V-1}{2}+\frac{V}{2}+\frac{V-2}{1}=0\)

or, \(\rm \frac{V-1+V+2V-4}{2}=0\)

or, 4 V = 5 ⇒ V = 1.25 V

∴ \(\rm I=\frac{1.25}{2}=0.625\ A\)

Therefore, the correct option is (4).