Hi,

Inductors can have no voltage across them but still have current in the same way that capacitors can have some voltage across them with no current flowing.

Here is a quick hint:

The inductor is the dual of the capacitor in that the roles of current and voltage are swapped as are the roles of the through and across variables.

The ideal capacitor where there is zero current through it gains or looses no voltage, so what does the ideal inductor do when there is zero voltage across it?

Another approach is to find the limit of:

i*e^(-t*R/L)

as R approaches zero

Also note that the expression:

V/R*e^(-t*R/L)

would be invalid for this problem.

Inductors can have no voltage across them but still have current in the same way that capacitors can have some voltage across them with no current flowing.

Here is a quick hint:

The inductor is the dual of the capacitor in that the roles of current and voltage are swapped as are the roles of the through and across variables.

The ideal capacitor where there is zero current through it gains or looses no voltage, so what does the ideal inductor do when there is zero voltage across it?

Another approach is to find the limit of:

i*e^(-t*R/L)

as R approaches zero

Also note that the expression:

V/R*e^(-t*R/L)

would be invalid for this problem.

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