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The current in an inductive circuit is given by 0.3 sin (200t – 40°) A. Write the equation for the voltage across it if the inductance is 40 mH. |
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Answer» L = 40 x 10-3 H; i = 0.1 sin (200 t – 40°); XL = ωL = 200 x 40 x 10-3 = 8 Ω Vm = Im XL = 0.3 x 8 = 2.4 V In an inductive circuit, the voltage leads the current by 90° Therefore, \(v\)= Vm sin (ωt + 90°) \(v\) = 2.4 sin (200f – 40°+ 90°) \(v\)= 2.4 sin (200f +50°)volt |
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