Question

When the switch is closed, then the initial current through $1\Omega$ resistor is

• A. $12\text{A}$
• B. $4\text{A}$
• C. $\frac{10}{7}\text{A}$
• D. $3\text{A}$

Answer 1

The correct option is B $4\text{A}$

At $t=0$ , the capacitor behaves as a short circuit. Hence, we can redraw the given circuit as follows,


$\Downarrow$


$\Downarrow$


$\therefore$ Current through $1\Omega$ resistor is, $I=\frac{V}{R}=\frac{12}{3}=4\text{A}$

Hence, option (b) is the correct answer.