Q.

The equivalent resistance between the points X and Y of the following fig is

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a

10 Ω

b

22 Ω

c

20Ω

d

50 Ω

answer is A.

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Detailed Solution

The equivalent circuit is shown in fig. Since thebridge is balanced, hence the resistance between B and D is in effective.Resistance of part ABC = 10 + 10 = 20 ΩResistance of pad ADC = 10 + 10 = 20 ΩEquivalent resistance E is given by1R=120+120=220=110R=10Ω
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