Alternating CurrentHard

Question

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?

Options

A.6 ampere
B.2 ampere
C.2√3 ampere
D.0.65 ampere

Solution

P = I2rms R = [(2)2 R ] × 3    ⇒    Irms =  A    

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