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Q. Write the equation of a 25 cycle current sine wave having rms value of 30 A.
Data: ν = 25 Hz, Irms = 30 A
Solution: i = Io sin ωt
= Irms √2 sin 2πνt
i = 30 √2 sin2π × 25 t = 42.42 sin 157 t
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