The voltage V in the given figure is

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The voltage V in the given figure is—

1. 2 V
2. 4 V
  3
3. 4 V
4. 8 V

Correct Option: C

In order to calculate the voltage across 4 Ω resistor, first we will calculate the current in 4 resistor due to voltage source, due to finding this calculate I as shown in the figure.

I =	V
	R_eq

R _eq = 4 + 4 || (2 + 2) = 4 + 2 = 6 Ω

so, I =	12	= 2 amp.
	6

Now, the current in branch AB

= I ×		4	=	2 x 4	= 1 amp.
		4 + 4		8

so, voltage drop across 4 Ω = 1 × 4 = 4 V