In a circuit an a.c. current and a d, c....

In a circuit an a.c. current and a d, c. current are supplied together. The expression of the instantaneous current is given as `i=3+6sinomegat` Then the rms value of the current is –

A

3

B

6

C

`3sqrt(2)`

D

`3sqrt(3)`

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The correct Answer is:

D

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