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Define, alternating current and give its...

Define, alternating current and give its expression.

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Alternating current is defined as an electric current which is induced when a coil is rotated in a uniform magnetic field. Since the induced current varies in magnitude and direction periodically, it is called alternating current.
Alternating current is given by
`I=I_(0)sin omega t`
`I_("rms")=(I_(0))/(sqrt2)`
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