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28, 29, 30

28, 29, 30

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Please answer partin detail 28, 29, 30 and 31, Thankyou so much.

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A mass spectrometer (see diagram) is an analytic device used to identify various charged particles by measuring their charge to mass ratio. The charged particles are accelerated through a potential difference AV, and they enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased or decreased, different charged particles reach the detector and are measured. The diagram shows the set-up for detecting positive charges, but it can be easily adjusted to detect negative charges (by reversing the polarity of the accelerating potential and reversing the direction of the B-field). So we'll assume that the necessary adjustments have been made in this question if we are talking about negative charges rather than positive ones. AV Assume the B-field is at Bo = 8x104 T and the spacing between the entrance and exit holes is d=8.00 cm. 27. If the accelerating potential is adjusted to 500V, with what speed (in m/s) do the electrons get ejected into the magnetic field? Ans: A a. 1.33x107 b. 2.94x107 c. 0.81x10 d. 7.11x10" Detector 28. How far away (in cm) from the entrance hole would those electrons strike the wall? Ans: C a. 3.55 b. 6.31 с. 18.9 d. 23.7 29. What magnetic field (in µT) would have to be applied to allow the electrons to be detected by the detector? Ans: C a.511 b. 2225 c. 1886 d. 800 30. If the magnetic field is returned back to its original magnitude, Bo, what accelerating potential (in V) is necessary to detect protons? Ans: D b. 722 a. 6.77 c. 85.3 d. 0.0491 31. If the magnetic field remains at its original magnitude, Bo, but the potential is adjusted to 200V, what will be the charge-to-mass ratio (in C/kg) of the detected particles? Ans: B a. 8.99x10" b. 3.91x10" c. 1.33x10" е. 13.6х101
Transcribed Image Text:A mass spectrometer (see diagram) is an analytic device used to identify various charged particles by measuring their charge to mass ratio. The charged particles are accelerated through a potential difference AV, and they enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased or decreased, different charged particles reach the detector and are measured. The diagram shows the set-up for detecting positive charges, but it can be easily adjusted to detect negative charges (by reversing the polarity of the accelerating potential and reversing the direction of the B-field). So we'll assume that the necessary adjustments have been made in this question if we are talking about negative charges rather than positive ones. AV Assume the B-field is at Bo = 8x104 T and the spacing between the entrance and exit holes is d=8.00 cm. 27. If the accelerating potential is adjusted to 500V, with what speed (in m/s) do the electrons get ejected into the magnetic field? Ans: A a. 1.33x107 b. 2.94x107 c. 0.81x10 d. 7.11x10" Detector 28. How far away (in cm) from the entrance hole would those electrons strike the wall? Ans: C a. 3.55 b. 6.31 с. 18.9 d. 23.7 29. What magnetic field (in µT) would have to be applied to allow the electrons to be detected by the detector? Ans: C a.511 b. 2225 c. 1886 d. 800 30. If the magnetic field is returned back to its original magnitude, Bo, what accelerating potential (in V) is necessary to detect protons? Ans: D b. 722 a. 6.77 c. 85.3 d. 0.0491 31. If the magnetic field remains at its original magnitude, Bo, but the potential is adjusted to 200V, what will be the charge-to-mass ratio (in C/kg) of the detected particles? Ans: B a. 8.99x10" b. 3.91x10" c. 1.33x10" е. 13.6х101
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