Question

Find current through $4\Omega$ resistance in the given circuit ?

• A. $1\text{A}$
• B. $2\text{A}$
• C. $3\text{A}$
• D. $4\text{A}$

Answer 1

The correct option is C $3\text{A}$

Distributing potentials at junctions of the given circuit as shown in figure,


Using KCL at the junction with unknown potential $x$ we get,

$\frac{x}{4}+\frac{x-20}{2}+\frac{x-10}{2}=0$

$\Rightarrow x=12\text{V}$

$\therefore$ Current through $4\Omega$ resisatnce is,

$I=\frac{V}{R}=\frac{12}{4}=3\text{A}$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, (c) is the correct answer.