First slide

combination of resistance

Question

Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is

Moderate

A

$3 Ω$
B

$4 Ω$
C

$4.5 Ω$
D

$5 Ω$

Solution

The given circuit can be simplified as follows:
Now it is a balanced Wheatstone bridge.
So,
$\Rightarrow R_{AB} = \frac{8 \times 8}{8 + 8} = \frac{64}{16} = 4 Ω$

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