What is the rms value of an alternating current which when passed through a resistor produces heat which is thrice that produced by a direct current of 2 A in the same resistor?
A
6 A
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B
2 A
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C
3.46 A
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D
0.65 A
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Solution
The correct option is C 3.46 A I2rmsR=3×22R ⇒Irms=2√3=3.46A