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# industrial electromagnet can be modeled as an RL circuit,

ISBN: 9780321747730 43

## Solution for problem 7E Chapter 3.5

Fundamentals of Differential Equations | 8th Edition

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Problem 7E

An industrial electromagnet can be modeled as an RL circuit, while it is being energized with a voltage source. If the inductance is 10 H and the wire windings contain 3 ?of resistance, how long does it take a constant applied voltage to energize the electromagnet to within 90% of its final value (that is, the current equals 90% of its asymptotic value)?

Step-by-Step Solution:

SolutionStep 1 of 5In this problem we have to determine the time required to energize an electromagnet to 90% of its final value (90% of asymptotic value) by applying a constant voltage source.Step 2 of 5We know that the equation for current in a series RL circuit is given byWhere E - Applied voltage R - Resistance of the circuit - time constant of the circuitStep 3 of 5Given L = 10 H, R = 3 ==When the circuit is operating at 90% of its final value, we can write

Step 4 of 5

Step 5 of 5

##### ISBN: 9780321747730

Fundamentals of Differential Equations was written by and is associated to the ISBN: 9780321747730. This textbook survival guide was created for the textbook: Fundamentals of Differential Equations , edition: 8. Since the solution to 7E from 3.5 chapter was answered, more than 323 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 7E from chapter: 3.5 was answered by , our top Calculus solution expert on 07/11/17, 04:37AM. The answer to “An industrial electromagnet can be modeled as an RL circuit, while it is being energized with a voltage source. If the inductance is 10 H and the wire windings contain 3 ?of resistance, how long does it take a constant applied voltage to energize the electromagnet to within 90% of its final value (that is, the current equals 90% of its asymptotic value)?” is broken down into a number of easy to follow steps, and 63 words. This full solution covers the following key subjects: electromagnet, voltage, its, inductance, constant. This expansive textbook survival guide covers 67 chapters, and 2118 solutions.

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