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प्रश्न
Calculate the instantaneous value at 60°, average value and RMS value of an alternating current whose peak value is 20 A.
उत्तर
Given data:
Im = 20 A Q = 60°
i) Instantaneous value of current
i = Im sin θ
= 20 × Sin 60°
= 20 × `sqrt3/2`
= 10 × `sqrt3`
= 10 × 1.732
i = 17.32 A
ii) Average value
Iav = 0.637 Im
Iav = 0.637 × 20
= 6.37 × 2
Iav = 12.74 A
iii) Irms = 0.707 Im
= 0.707 × 20
= 7.07 × 2
Irms = 14.14 A
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