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Question:

A 5.0 mH inductor and a 11.0 Ω resistor are connected in series with a 9 V dc battery as shown. (a) What is th?

A 5.0 mH inductor and a 11.0 Ω resistor are connected in series with a 9 V dc battery as shown.

Answer:

I'll assume an ideal inductor having no internal resistance. a) When the switch is closed at t0 the voltage across the resistor is zero. Hence, all voltage is across the inductor. V Ldi/dt 9V b) By Ohm's law nearly all voltage is across the resistor: V ir 9V after a long time. c) The resistor and inductor have the same current: i V/r 9 v / 11 ohms 9/11 A

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