Question 4The voltage across an inductor, when connected to a constant current sOurce, is equal to infinity at time t=0.TrueO insufficient data to reach a conclusionO False

Answered: The voltage across an inductor, when…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 83PE: (a) Find me current through a 0.500 H inductor connected to a 60.0 Hz, 430 V AC source. (b) What...

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Unreasonable Results 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?
Two rectangular loops of wire lie in the same plane as shown in Figure OQ31.11. If the current I in the outer loop is counterclockwise and increases with time, what is true of the current induced in the inner loop? More than one statement may be correct, (a) It is zero, (b) It is clockwise, (c) It is counterclockwise, (d) Its magnitude depends on the dimensions of the loops, (e) Its direction depends on the dimensions of the loops.
(a) Use the exact exponential treatment to find how much time is required to bring the current through an 80.0 mH inductor in series with a 15.0 (resistor to 99.0% of its final value, starting from zero. (b) Compare your answer to the approximate treatment using integral numbers of (c) Discuss how significant the difference is.
Electrosurgical units (ESUs) supply high-frequency electricity from resonant RLC circuits to cut. coagulate, or otherwise modify biological tissue. (a) Find the resonant frequency of an ESU with an inductance of L = 1.25 H and a capacitance of 47.0 nF. (b) Calculate the capacitance required for a resonant frequency of 1.33 MHz.
Electrosurgical units (ESUs) supply high-frequency electricity from resonant RLC circuits to cut. coagulate, or otherwise modify biological tissue. (a) Find the resonant frequency of an ESU with an inductance of L = 1.25 H and a capacitance of 47.0 nF. (b) Calculate the capacitance required for a resonant frequency of 1.33 MHz.
A 2.0-F capacitor is charged to a potential difference of 12.0 V and then connected across a 0.40-mH inductor. What is the current in the circuit when the potential difference across the capacitor is 6.0 V?
A 100-mH inductor is connected across the emf of the preceding problem. (a) What is the reactance of the Inductor? (b) Write an expression for the current through the inductor.
Your RL circuit has a characteristic time constant of 20.0 ns, and a resistance of 5.00 M (a) What is the inductance of the circuit? (b) What resistance would give you a 1.00 ns time constant, perhaps needed for quick response in an oscilloscope?
Check Your Understanding A transformer steps the line voltage down from 110 to 9.0 V so that a current of 0.50 A can be delivered to a doorbell (a) What is the ratio of the number of turns in the primary and secondary windings? (b) What is the current in the primary winding? (c) What is the resistance seen by the 110-V source?
A transformer is used to supply a 12-V model train with power from a 110-V wall plug. The train operates at 50 W of power, (a) What is the rms current in the secondary coil of the transformer? (b) What is me rms current in the primary coil? (c) What is the ratio of the number of primary to secondary turns? (d) What is the resistance of the tram? (e) What is the resistance seen by the 110-V source?
A switch controls the current in a circuit that has a large inductance. The electric are at the switch (Fig. CQ32.3) can melt and oxidize the contact surfaces, resulting in high resistivity of the contacts and eventual destruction of the switch. Is a spark more likely to be produced at the switch when the switch is being closed, when it is being opened, or does it not matter?
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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The voltage across an inductor, when connected to a constant current source, is equal to infinity at time t=». True O insufficient data to reach a conclusion False