An AC e.m.f E = 4 cos ⁡ 1000 t V is applied to an L R circuit containing inductance 3 m H and resistance 4 Ω . The amplitude of the current is

Question

An AC e.m.f E = 4 cos ⁡ 1000 t V is applied to an L R circuit containing inductance 3 m H and resistance 4 Ω . The amplitude of the current is, 4 7 A, 1.0 A, 4 7 A, 0.8 A

MARKS App · Accepted Answer

i 0 = V 0 Z , Z = R 2 + ω L 2 = 4 2 + 1000 × 3 × 1 0 - 3 2 = 5 Ω i 0 = 4 5 i 0 = 0.8 A

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