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In the circuit given below, the value of R is ____________(a) 12 Ω(b) 6 Ω(c) 3 Ω(d) 1.5 ΩThe question was asked during an online exam.This key question is from Advanced Problems on Filters topic in section Filters and Attenuators of Network Theory

Answer»

Correct answer is (b) 6 Ω

Best EXPLANATION: The resistance of parallel combination is given by,

Req = \(\frac{40}{3}\) – 10 = 3.33 Ω

Or, \(\frac{1}{3.33} = \frac{1}{12} + \frac{1}{15} + \frac{1}{15}\)

Or, R = 6 Ω.



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