Question

For a circuit shown in the fig., total current in the circuit is

• A. 1A
• B. 1.8A
• C. 2A
• D. 0A

Answer 1

The correct option is B 1.8A

Equivalent resistance of the circuit $\frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$ (for parallel connection)

$\therefore$ $\frac{1}{R_{eq}}=\frac{1}{10}+\frac{1}{10}+\frac{1}{10}$ $⟹R_{eq}=\frac{10}{3}\Omega$

Thus total current in the circuit $I=\frac{V}{R_{eq}}=\frac{6}{10/3}=1.8$ A