Question

The current i in the circuit (see figure) is –

• A. $\frac{1}{45}\text{A}$
• B. $\frac{1}{15}\text{A}$
• C. $\frac{1}{10}\text{A}$
• D. $\frac{1}{5}\text{A}$

Answer 1

The correct option is C $\frac{1}{10}\text{A}$

Equivalent resistance:
$R_{eq}=\frac{(30+30)\times 30}{(30+30)+30}=\frac{1800}{90}=20\Omega$
Electric current
$i=\frac{V}{R}=\frac{2V}{20\Omega }=\frac{1}{10}\text{A}$