First slide

CIrcuit questions

Question

In the electrical circuit shown in the figure, the current i through the side AB is :

Moderate

A

$\frac{10}{33} A$
B

$\frac{1}{5} A$
C

$\frac{10}{63} A$
D

$\frac{6}{25} A$

Solution

The current drawn from battery
$\begin{array}{l} I = \frac{10}{10 + 3 + \frac{20 \times 30}{50}} = \frac{10}{25} A \\ i : I - i = 3 : 2 \\ i = \frac{3}{5} I = \frac{3}{5} \times \frac{10}{25} = \frac{6}{25} A \end{array}$

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