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In the circuit given below, the value of resistance R is _________(a) 10 Ω(b) 18 Ω(c) 24 Ω(d) 12 ΩI have been asked this question in an interview for internship.I would like to ask this question from Advanced Problems Involving Complex Circuit Diagram topic in chapter Network Theory and Complex Circuit Diagram of Network Theory

Answer»

The correct choice is (d) 12

Explanation: Using KVL in loop 1, we get, 100 – 14I – 30 = 0

Or, I = \(\frac{70}{14}\) = 5 A

Then, VP – VQ = 14I – (15-I).1

= 70 – 10 = 60 V

R = \(\frac{60}{10-I} = \frac{60}{5}\) = 12 Ω.



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