Find the equivalent resistance of the circuits shown in figure between the points a and b. Each resistor has a resistance r

Q. Find the equivalent resistance of the circuits shown in figure between the points a and b. Each resistor has a resistance r
Current Electricity
(a) r/2
(b) r/3
(c) r/4
(d) r/5
Ans: A
The upper circuit forms Wheatone bridge . At first find the equivalent resistance of upper circuit , then this equivalent resistance of the upper circuit is in parallel with resistor between a and b .

Author: Rajesh Jha

QuantumStudy.com

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