SSC JE Electrical Engineering 2014 Set 1 Paper

Question : 133 of 200

Marks: +1, -0

Find

R_{\AB}

for the circuit shown in figure.

Solution:

Current flowing through 50Ω resistor is zero because the bridge is in balanced condition.
then,

RAB = {30Ω}∥ {40Ω}= {30× 45}/75 = 18 Ω

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