Answered: R 2R + 3. R L. Figure P31.15 Problems…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter34: Maxwell’s Equations And Electromagnetic Waves

Section: Chapter Questions

Problem 18PQ

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Question

In the circuit diagrammed as shown, assume the switch has been closed for a long time interval and is opened at t = 0. Also assume R = 4.00 Ω, L = 1.00 H, and ε = 10.0 V.(a) Before the switch is opened, does the inductor behave
as an open circuit, a short circuit, a resistor of some particular resistance, or none of those choices? (b) What current does the inductor carry? (c) How much energy is stored in the inductor for t < 0? (d) After the switch is opened, what happens to the energy previously stored in the inductor? (e) Sketch a graph of the current in the inductor for t ≥ 0. Label the initial and final values and the time constant.

R
2R
+
3.
R
L.
Figure P31.15 Problems 15, 16, and 8.

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