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An alternating current is given by I =...

An alternating current is given by
`I = i_1 cos omegat + i_2 sin omegat`.
The rms current is given by

A

`sqrt(I_0/2)`

B

`I_0/ sqrt2`

C

`I_0/ 2`

D

`I_0`

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The correct Answer is:
D
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