Effective resistance between $A$ and $B$ in the following circuit

10 Ω

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20 Ω

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5 Ω

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\frac{20}{3} Ω

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Solution

The correct option is A $10 Ω$
Equivalent circuit of the given circuit is shown above which is a balanced Wheat stone bridge i.e. $\frac{10}{10} = \frac{10}{10}$
Equivalent resistance between A and B, $R_{e q} = (10 + 10) ∥ (10 + 10) = 20 ∥ 20$
$∴$ $R_{e q} = \frac{20 \times 20}{20 + 20} = 10 Ω$

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Effective resistance between A and B in the following circuit

The correct option is A 10ΩEquivalent circuit of the given circuit is shown above which is a balanced Wheat stone bridge i.e. 1010=1010Equivalent resistance between A and B, Req=(10+10)∥(10+10)=20∥20∴ Req=20×2020+20=10Ω

Effective resistance between $A$ and $B$ in the following circuit