In the circuit shown, the switch closes and is left closed for a long time. Then the switch is opened. Imediately after it is opened, what is the potential difference across the inductor L?

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter1: General Information For Electrical Installations
Section: Chapter Questions
Problem 14R
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In the circuit shown, the switch closes and is left closed for a long time. Then the switch is opened. Imediately after it is opened, what is the potential difference across the inductor L?

80V
上Fl
+
40 ohm
M
30 ohm
L = 0.30H
m
Transcribed Image Text:80V 上Fl + 40 ohm M 30 ohm L = 0.30H m
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