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