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  4. The effective resistance between points P and Q of the electrical circuit shown in the figure is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-t1dymsmobj7s.png />

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

Question

NTA AbhyasNTA Abhyas 2020Current Electricity

Solution:

According balanced wheat stone bridge
Solution
$\frac{1}{R_{e q}}=\frac{1}{2 R}+\frac{1}{2 R}+\frac{1}{R}$
$=\frac{1 + 1 + 2}{2 R}=\frac{2}{R}$
$R_{e q}=\frac{R}{2}$