The correct expression for the instantaneous current if instantaneous voltage is Vm(sint) in an inductive circuit is?(a) i = Vm(sint)/XL(b) i = Vm(cost)/XL(c) i = -Vm(sint)/XL(d) i = -Vm(cost)/XLThis question was addressed to me during an interview.My question is from Alternating Current in a Resistive & Inductive Circuit topic in portion Single Phase Series Circuits of Basic Electrical Engineering

The correct expression for the instantaneous current if instantaneous

1.	The correct expression for the instantaneous current if instantaneous voltage is Vm(sint) in an inductive circuit is?(a) i = Vm(sint)/XL(b) i = Vm(cost)/XL(c) i = -Vm(sint)/XL(d) i = -Vm(cost)/XLThis question was addressed to me during an interview.My question is from Alternating Current in a Resistive & Inductive Circuit topic in portion Single Phase Series Circuits of Basic Electrical Engineering
Answer» RIGHT answer is (d) i = -VM(COST)/XL Explanation: V=Vm*sint I=V/XL = -Vm(cost)/XL(since current lags VOLTAGE by 900 in inductive circuit).

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