Question

The current through the $5\Omega$ resistor is

• A. $10\text{A}$
• B. $1\text{A}$
• C. $2.5\text{A}$
• D. $0.4\text{A}$

Answer 1

The correct option is D $0.4\text{A}$

As we know that potential of earthed point is zero. And considering this assumption the potentials of different points can be obtained which are shown in figure,


From above diagram, current $I$ through $5\Omega$ resistance will be

$I=\frac{P.D.}{\text{Resistance}}$

$\Rightarrow I=\frac{(4-2)}{5}=0.4\text{A}$

So, option $\left(d\right)$ is correct.