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Question

Find the equivalent resistance across the points A and B in the given circuit.


A

1 Ω

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B

2 Ω

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C

4 Ω

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D

8 Ω

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Solution

The correct option is B

2 Ω


Resistors 'a' and 'b' are connected in series, so the equivalent resistance, R1 is
R1=2+2=4 Ω

Resistors 'c' and 'd' are connected in series, so the equivalent resistance, R2 is
R2=2+2=4 Ω

R1 and R2 are in parallel, so the equivalent resistance is
1Requ=1R1+1R2=14+14=12
Or, Requ=2 Ω

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