A unit-step voltage is applied at t = 0 to a series R-L circ

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A unit-step voltage is applied at t = 0 to a series R-L circuit with zero initial condition. Then

[ESE (IES) EC 2017 Technical]

A it is possible for the current to be –oscillatory

B The voltage across the resistor at t = 0+ is zero

C the voltage across the resistor at t = 0- is zero

D Both (B) and (C)