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Message: <blockquote data-quote="imhotep" data-source="post: 23943656" data-attributes="member: 562115">You got it mixed up...at t= 0 (as soon as the battery is connected) the rate of change of current di/dt is not zero and is finite. So there is a back emf in the inductor which is L*(di/dt) till the current reaches the maximum value (which is governed by the resistance in the circuit - if there is no resistor, there is an inherent resistance in the coil of the inductor - it is not zero - which limits the current)Once the current reaches it's maximum di/dt=0 and the inductor no longer operates and there is no back emf.It is di/dt that matters!</blockquote>

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