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The effective resistance between points P and Q of the electrical circuit shown in the figure is

Option: 1

\frac{10}{(2 r+5)}


Option: 2

\frac{5}{(2r +5)}


Option: 3

\frac{10 r}{(2 r+5)}


Option: 4

\frac{5 r}{(2 r+5)}


Answers (1)

best_answer

The equivalent Circuit

\frac{1}{R_{e q}}=\frac{s}{2 \times 5}+\frac{1}{2 r}+\frac{1}{2 \times 5} \\

\Rightarrow \frac{1}{R_{e q}}=\frac{1}{5}+\frac{1}{2r} \\

\Rightarrow \quad R_{e q}=\frac{10 r}{(2 r+5)} \\

Posted by

Rishabh

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