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Resistance of a wire is yΩ. The wire is stretched to triple its length, then the resistance becomes ___________(a) y/3(b) 3y(c) 6y(d) y/6I got this question in final exam.My question comes from Ohm’s Law topic in section Circuit Elements and Kirchhoff’s Laws of Network Theory

Answer»

The correct ANSWER is (b) 3y

Explanation: RESISTANCE of a conductor is DIRECTLY proportional to its length. That is, when the length of conductor is tripled, its resistance also gets tripled.



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