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Question

The equivalent resistance between points A and B is:


A
652 Ω
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B
135 Ω
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C
45 Ω
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D
452 Ω
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Solution

The correct option is D 452 Ω
Potential is same on all points of short circuited wire. Let mark the point having same potential as x and y.


Resistance 25 Ω, 50 Ω and 50 Ω are in parallel becuase all three are connected across x and y.


Now, all the three resistances are in series combination, because current passing through them will be same if a battery is connected across A and B.

Req=2+252+8=452 Ω

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