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# A fluorescent light uses cathodes (coiled tungsten filaments coated with an

ISBN: 9781118477502 422

## Solution for problem DP9-9 Chapter 9

Introduction to Electric Circuits | 9th Edition

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Introduction to Electric Circuits | 9th Edition

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Problem DP9-9

A fluorescent light uses cathodes (coiled tungsten filaments coated with an electron-emitting substance) at each end that send current through mercury vapors sealed in the tube. Ultraviolet radiation is produced as electrons from the cathodes knock mercury electrons out of their natural orbits. Some of the displaced electrons settle back into orbit, throwing off the excess energy absorbed in the collision. Almost all of this energy is in the form of ultraviolet radiation. The ultraviolet rays, which are invisible, strike a phosphor coating on the inside of the tube. The rays energize the electrons in the phosphor atoms, and the atoms emit white light. The conversion of one kind of light into another is known as fluorescence. One form of a fluorescent lamp is represented by the RLC circuit shown in Figure DP 9-9. Select L so that the current i(t) reaches a maximum at approximately t 0.5 s. Determine the maximum value of i(t). Assume that the switch was in position 1 for a long time before switching to position 2 at t 0. Hint: Use PSpice to plot the response for several values of L. t = 0 10 V + 1 2 i L F 4 1 3 Figure DP 9-9 Flourescent lamp circuit.

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Day 12 ­A while loop will only execute when the conditions are met ­Golden rule for while loops: your variable has to change within the loop ­First line is while(condition); last line is end ­If you are stuck in a loop, do Ctrl + C Write a code for how long it will take to pay back the...

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##### ISBN: 9781118477502

This textbook survival guide was created for the textbook: Introduction to Electric Circuits, edition: 9. The answer to “A fluorescent light uses cathodes (coiled tungsten filaments coated with an electron-emitting substance) at each end that send current through mercury vapors sealed in the tube. Ultraviolet radiation is produced as electrons from the cathodes knock mercury electrons out of their natural orbits. Some of the displaced electrons settle back into orbit, throwing off the excess energy absorbed in the collision. Almost all of this energy is in the form of ultraviolet radiation. The ultraviolet rays, which are invisible, strike a phosphor coating on the inside of the tube. The rays energize the electrons in the phosphor atoms, and the atoms emit white light. The conversion of one kind of light into another is known as fluorescence. One form of a fluorescent lamp is represented by the RLC circuit shown in Figure DP 9-9. Select L so that the current i(t) reaches a maximum at approximately t 0.5 s. Determine the maximum value of i(t). Assume that the switch was in position 1 for a long time before switching to position 2 at t 0. Hint: Use PSpice to plot the response for several values of L. t = 0 10 V + 1 2 i L F 4 1 3 Figure DP 9-9 Flourescent lamp circuit.” is broken down into a number of easy to follow steps, and 207 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 146 chapters, and 1397 solutions. The full step-by-step solution to problem: DP9-9 from chapter: 9 was answered by , our top Engineering and Tech solution expert on 03/14/18, 07:39PM. Since the solution to DP9-9 from 9 chapter was answered, more than 210 students have viewed the full step-by-step answer. Introduction to Electric Circuits was written by and is associated to the ISBN: 9781118477502.

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A fluorescent light uses cathodes (coiled tungsten filaments coated with an