First slide

combination of resistance

Question

In the network shown, equivalent resistance between A and B is

Moderate

A

6R
B

3R/2
C

$\frac{2 R}{5}$
D

$\frac{2 R}{3}$

Solution

The circuit can be reduced to
$∴ \frac{1}{R_{A B}} = \frac{1}{2 R} + \frac{1}{2 R} + \frac{1}{2 R}$
$\Rightarrow R_{A B} = \frac{2 R}{3}$

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