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If the instantaneous current in a circuit is given by `I = 20 cos (omega t + phi) A`, the rms value of the current is

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If the instantaneous current in a circuit is given by `I = 20 cos (omega t + phi) A`, the rms value of the current is
A. `2A`
B. `sqrt(2) A`
C. `2 sqrt(2) A`
D. zero
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1 Answer

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Correct Answer - 2
`I_("rms") = (I_(0))/(sqrt(2))`
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