Electromagnetism - RL Circuit

 

In the circuit shown above, the switch S is closed at t = 0. Which of the following best represents the voltage across the inductor, as seen on an oscilloscope?

(GR0177 #40)
Solution:

The voltage drops across the resistor and the inductor  (A), (B), (C) are FALSE.

The time constant when the voltage decreases slowly is



Answer: D

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