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A 25.0 H inductor has 100 A of current turned off in 1.00 ms. (a) What voltage is induced to oppose this? (b) What is unreasonable about this result? (c) Which assumption or premise is responsible?

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Physics 102 Electricity and Magnetism

Chapter 23

Electromagnetic Induction, AC Circuits, and Electrical Technologies

Electromagnetic Induction

Rutgers, The State University of New Jersey

University of Michigan - Ann Arbor

University of Washington

Hope College

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So here we know that four part a the E m f is equaling the self inductions times a change in current divided by Delta T This is gonna be equaling the self induction ce we know to be 25. Henry's multiplied by 100 amps and then we have one millisecond or we can say 10 to the negative third seconds. This is equaling 2.5 times 10 to the sixth votes. That would be your answer for part A for part B. Ah, the E m s is unreasonable and too high. So the unit is actually so high that our king may occur and the reduction of current would not occur so rapidly so we wouldn't be able to go from 100 grams to zero amps to no current in one millisecond. It wouldn't occur because this E m f is actually way too high. And then for part C. What's reason unreasonable about the premise is that these induct in ce this induct ins's and this current they're achievable. However, this time given these two variables, is not possible. So, um, such a short time interval is not possible to shut off. Um such a large current. So the time the time period is what is responsible for this unreasonable result. That would be the unreasonable premise that is the end of the solution.

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