Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 31, Problem 53CP
To determine

The equivalent inductance Leq for the system.

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A resistor and inductor are connected to a 9.0 V battery by a switch as shown. The moment the switch is closed, current flows through the circuit. The resistor has a resistance of R = 440 Ω and the inductor has an inductance of L = 150 mH. a) write an equation that relates the current as a function of time i(t) to the maximum current, imax. Express the equation in terms of imax and α, where α = -t/T (time constant). b) determine the time, in seconds, at which the current has a value of i(t50) = 50% of imax. c) determine the time, in seconds, at which the current has a value of i(t99) = 99% of imax.
The current I flowing rightward through inductor L is at a steady rate of 0.1280 A/s. The magnitude I εL I of the difference between the right end and the left end of the inductor is 0.0160 (V). What is the inductance L? Which end of the inductor above is at higher voltage, the left end or the right end? Explain.
Your RL circuit has a characteristic time constant of 21.5 ns, and a resistance of 5.40 MΩ. A. What is the inductance (in H) of the circuit? B. What resistance (in MΩ) should you use (instead of the 5.40 MΩ resistor) to obtain a 1.00 ns time constant, perhaps needed for quick response in an oscilloscope?

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Physics for Scientists and Engineers with Modern Physics

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