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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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.
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