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Clayton State University
Department of Natural Sciences
June 26, 2008
Physics 1112 – Quiz 7
Name __SOLUTION___________________________________
Two singly ionized atoms move out of a slit at point S, as shown in the Figure below,
and into a magnetic field 0f 0.100 T. Each has a speed of 1.00 x 106 m/s. The nucleus of
the first atom contains one proton and has a mass of 1.67 x 10-27 kg, and the nucleus of
the second atom contains two neutrons and has a mass of 3.34 x 10-27 kg. Find their
distance of separation when they strike a photographic plate P.
r = (mV)/(|q| B)
r1 = {(1.67 x 10-27 kg)(1.00 x 106 m/s)}/{(1.60 x 10-19 C)(0.100 T)} = 0.104 m
r2 = {(3.34 x 10-27 kg)(1.00 x 106 m/s)}/{(1.60 x 10-19 C)(0.100 T)} = 0.208 m
d = 2 (r2 – r1) = 0.207 m
Clayton State University
Department of Natural Sciences
March 1, 2006
Physics 1112 – Quiz 5
Name ___SOLUTION__________________________________
Alpha particles of charge q = + 2e and mass m = 6.60 x 10-27 kg are emitted by
radioactive source at a speed of 1.60 x 107 m/s.
a. What magnetic field strength would be required to bend them into a circular path of
radius r = 0.250 m?
r = (mV) / (qB)
B = (mV) / (rq)
B = (6.60 x 10-27 kg)(1.60 x 107 m/s) / ((0.250 m)(1.60 x 10-19 C)) = 1.32 T
b. If the magnetic field is directed out of the page, do the particles rotate clockwise or
counterclockwise?
Clayton College & State University
Department of Natural Sciences
October 13, 2004
Physics 1112 – Quiz 5
Name _____SOLUTION________________________________
1. Find the direction of the magnetic force acting on the positively charged particle
for given orientations of particle’s velocity and constant magnetic field.
2. A proton is released such that its initial velocity is from right to left across this
page. The proton’s path, however, is deflected in a direction toward the bottom
edge of the page due to the presence of a uniform magnetic field. What is the
direction of this field?
a. Out of the page.
b. Into the page.
c. From bottom edge to top edge of the page.
d. From right to left across the page.
Clayton State University
Department of Natural Sciences
February 28, 2008
Physics 1112 – Quiz 6
Name ______SOLUTION_______________________________
1. Find the direction of the magnetic force acting on the negatively charged particle
for given orientations of particle’s velocity and constant magnetic field.
2. Find the direction of the constant magnetic field/particle’s velocity given the
orientation of the magnetic force acting on a positively charged particle and
particle’s velocity/orientation of the magnetic field.
Clayton State University
Department of Natural Sciences
June 26, 2007
Physics 1112 – Quiz 6
Name ___SOLUTION__________________________________
1. Find the direction of the magnetic force acting on the negatively charged particle
for given orientations of particle’s velocity and constant magnetic field.
2. Find the direction of the constant magnetic field/particle’s velocity given the
orientation of the magnetic force acting on a positively charged particle and
particle’s velocity/orientation of the magnetic field.
Clayton State University
Department of Natural Sciences
November 9, 2009
Physics 1112 – Quiz 7
Name _______SOLUTION______________________________
1. Find the direction of the magnetic force acting on the positively charged particle
for given orientations of particle’s velocity and constant magnetic field.
2. An electron is released such that its initial velocity is from right to left across this
page. The proton’s path, however, is deflected in a direction toward the bottom
edge of the page due to the presence of a uniform magnetic field. What is the
direction of this field?
a. Out of the page.
b. Into the page.
c. From bottom edge to top edge of the page.
d. From right to left across the page.
Clayton College & State University
Department of Natural Sciences
July13, 2010
Physics 1112 – Quiz 11
Name _SOLUTION____________________________________
1. Find the direction of the magnetic force acting on the positively charged particle
for given orientations of particle’s velocity and constant magnetic field.
2. A proton is released such that its initial velocity is from right to left across this
page. The proton’s path, however, is deflected in a direction toward the bottom
edge of the page due to the presence of a uniform magnetic field. What is the
direction of this field?
a. Out of the page.
b. Into the page.
c. From bottom edge to top edge of the page.
d. From right to left across the page.