Question

28. Find the equivalent resistance across the two ends A and B of the following
circuits.
(a)
(b)Assume that P and Q are at same potential.
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Answer 1

Explanation:

a. resistors are connected in parallel

R(equivalent) = R/3

b. under balanced condition,

1/R(equivalent) =1/2R + 1/2R +1/R

= 1/R +1/R

= 2/R

R(equivalent) = R/2 OHM.