determine the mass of the ions. a. Is the ion positive or negative? b. Determine the mass of the ion in terms of e, B, E and/or r. Show work. Note: your answer should not contain the speed v. c. What happens to the radius if a singly charged ion with twice the mass goes through the spectrometer? .8 times as large a factor of √2 as large • 1/2 as large • 4 times as large • unchanged • 1/4 as large • twice as large • a factor of 1/√√2 as large 1/8 as large d. What happens to the radius if the magnetic field is doubled both inside and outside the velocity selector? twice as large
determine the mass of the ions. a. Is the ion positive or negative? b. Determine the mass of the ion in terms of e, B, E and/or r. Show work. Note: your answer should not contain the speed v. c. What happens to the radius if a singly charged ion with twice the mass goes through the spectrometer? .8 times as large a factor of √2 as large • 1/2 as large • 4 times as large • unchanged • 1/4 as large • twice as large • a factor of 1/√√2 as large 1/8 as large d. What happens to the radius if the magnetic field is doubled both inside and outside the velocity selector? twice as large
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Physics 212 - Module 5 Hands On Activities Packet
2. A mass spectrometer is used to determine the mass of the
ions in a sample. Once the mass of the ions are known one
can determine what molecular composition of the sample.
The Behrend chemistry department has several mass
spectrometers.
A new singly charged ion (the sign of the charge is unknown
but we know it is either te or-e) enters a velocity selector
as shown with crossed electric and magnetic fields of
magnitude E and B. Only ions with the selected speed then
leave through the right hole and enter a region with the
same magnetic field B but no electric field. The magnetic
force then causes the charges to move in a semi-circular
path of radius r as shown. By measuring r one can
determine the mass of the ions.
a. Is the ion positive or negative?
• 8 times as large
• a factor of √2 as large
• 1/2 as large
b. Determine the mass of the ion in terms of e, B, E and/or r. Show work. Note: your answer should not
contain the speed v.
.8 times as large
• a factor of √2 as large
c. What happens to the radius if a singly charged ion with twice the mass goes through the spectrometer?
4 times as large
• 1/2 as large
• unchanged
• 1/4 as large
Student Add Name Here
• a factor of 1/√2 as large
• 1/8 as large
d. What happens to the radius if the magnetic field is doubled both inside and outside the velocity
selector?
• 4 times as large
V
• unchanged
B
• 1/4 as large
detector
OB
. twice as large
• twice as large
• a factor of 1/√2 as large
1/8 as large
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