Question

Potential difference between $A$ and $B$ in the following circuit s

• A. $2.8V$
• B. $4V$
• C. $6V$
• D. $5.6V$

Answer 1

The correct option is D $5.6V$

Let us say, current 'i', is flowing in the given circuit.

Applying Kirchhoff's loop law,

$6-\theta i-4-2i=0$

$2-10i=0$

$\Rightarrow i=\frac{2}{10}=\frac{1}{5}$A

moving from A to B

$v_A+4+8i=v_B$

$\Rightarrow v_B-v_A=8i+4$

$=8\times \frac{1}{4}+4$

$=1.6+4$

$\Rightarrow v_B-v_A=5.6$V.