What is the rms value of an alternating current which when passed t...

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What is the rms value of an alternating current which when passed through a resistor produces heat, which is thrice that produced by a D.C. current of 2 ampere in the same resistor in the same time interval?
(A) 6 ampere
(B) 2 ampere
(C) \( 2 \sqrt{3} \) ampere
(D) \( 0.65 \) ampere
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