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23.10 RL Circuits We know that the current through an inductor L cannot be turned on or off instantaneously. The change in current changes flux, inducing an emf opposing the change (Lenz's law). How long does the opposition last? Current will flow and can be turned off, but how long does it take? Figure 23.44 shows a switching circuit that can be used to examine current through an inductor as a function of time. 0.6321. 0.3681, O r= L/R 21 O 1= LR 2 3т 47 Зг 4t (a) (b) (c) Figure 23.44 (a) An RL circuit with a switch to turn current on and off. When in position 1, the battery, resistor, and inductor are in series and a current is established. In position 2, the battery is removed and the current eventually stops because of energy loss in the resistor. (b) A graph of current growth versus time when the switch is moved to position 1. (c) A graph of current decay when the switch is moved to position 2.

23.10 RL Circuits We know that the current through an inductor L cannot be turned on or off instantaneously. The change in current changes flux, inducing an emf opposing the change (Lenz's law). How long does the opposition last? Current will flow and can be turned off, but how long does it take? Figure 23.44 shows a switching circuit that can be used to examine current through an inductor as a function of time. 0.6321. 0.3681, O r= L/R 21 O 1= LR 2 3т 47 Зг 4t (a) (b) (c) Figure 23.44 (a) An RL circuit with a switch to turn current on and off. When in position 1, the battery, resistor, and inductor are in series and a current is established. In position 2, the battery is removed and the current eventually stops because of energy loss in the resistor. (b) A graph of current growth versus time when the switch is moved to position 1. (c) A graph of current decay when the switch is moved to position 2.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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 RL Circuits
• Calculate the current in an RL circuit after a specified number of characteristic time steps.
• Calculate the characteristic time of an RL circuit.
• Sketch the current in an RL circuit over time.

23.10 RL Circuits We know that the current through an inductor L cannot be turned on or off instantaneously. The change in current changes flux, inducing an emf opposing the change (Lenz's law). How long does the opposition last? Current will flow and can be turned off, but how long does it take? Figure 23.44 shows a switching circuit that can be used to examine current through an inductor as a function of time. 0.6321. 0.3681, O r= L/R 21 O 1= LR 2 3т 47 Зг 4t (a) (b) (c) Figure 23.44 (a) An RL circuit with a switch to turn current on and off. When in position 1, the battery, resistor, and inductor are in series and a current is established. In position 2, the battery is removed and the current eventually stops because of energy loss in the resistor. (b) A graph of current growth versus time when the switch is moved to position 1. (c) A graph of current decay when the switch is moved to position 2.
Transcribed Image Text:23.10 RL Circuits We know that the current through an inductor L cannot be turned on or off instantaneously. The change in current changes flux, inducing an emf opposing the change (Lenz's law). How long does the opposition last? Current will flow and can be turned off, but how long does it take? Figure 23.44 shows a switching circuit that can be used to examine current through an inductor as a function of time. 0.6321. 0.3681, O r= L/R 21 O 1= LR 2 3т 47 Зг 4t (a) (b) (c) Figure 23.44 (a) An RL circuit with a switch to turn current on and off. When in position 1, the battery, resistor, and inductor are in series and a current is established. In position 2, the battery is removed and the current eventually stops because of energy loss in the resistor. (b) A graph of current growth versus time when the switch is moved to position 1. (c) A graph of current decay when the switch is moved to position 2.
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