An AC source operates at a maximum voltage of 75 V and is connected to a 0.4 H inductor. If the current across the inductor is i(t) = iMAX cos[(450 s −1)t], a) What is iMAX? b) Draw the phasors for voltage across the inductor and current in the circuit at t = 4.2 ms. Assume that the current phasor begins at 0°.

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Multiple Choice

An AC source operates at a maximum voltage of 75 V and is connected to a 0.4 H inductor. If the current across the inductor is i(t) = i_MAX cos[(450 s ⁻¹)t],
a) What is i_MAX?
b) Draw the phasors for voltage across the inductor and current in the circuit at t = 4.2 ms. Assume that the current phasor begins at 0°.

a) i_max = 0.42A b) θ_iL = 108^o θ_VL = 198^o

a) i_max = 0.42A b) θ_iL = 108^o θ_VL = 18^o

a) i_max = 0.42A b) θ_iL = 198^o θ_VL = 108^o

a) i_max = 0.42A b) θ_iL = 18^o θ_VL = 108^o

Master Phasors for Inductors with a bite sized video explanation from Patrick Ford