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Magnetism
S432 Name ---------------------
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1. A proton moves horizontally and enters a region where there is a unifonn magnetic field
perpendicular to the proton's velocity as shown below. Describe the proton' s subsequent
motion.
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How would an electron act under the same circumstances? Draw the vector diagram to
support your answer.
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2. Find the direction of the magnetic field for a
situation below. b)
a) c)
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X F
3.
Find the direction of the force on a proton moving through each magnetic field below.
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v
A)
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X
X
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X
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X
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B)
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r
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Find the direction of the force on ~oving through each magnetic field shown
below.
A)
B)
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4.
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A wire carries a 10.0 A current moving south. If the magnitude of the magnetic force on
a5.0 m length of wire is 15 .0 N directed into the page, what is the magnitude and
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direction of the magnetic field? ,/S~N l?'
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A thin 1.00 m long copper rod in a unifonn magnetic field has a mass of 50.0 grams.
When the rod carries a current of 0.245 A, it floats in the magnetic field. What is the
magnetic field strength? (HINT: Draw an FBD.)
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A duck flying due east passes over Atlanta, where the magnetic field of the Earth is
5.0 x 10- 5 T directed north. The duck has a positive charge of 4.0 x 10-8 C. If the
magnetic force acting on the duck is 3.0 x 10-11 N eastward, what is the magnitude and
t r
1"",
direction of the duck's velocity? r..: ;~~ tr
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8. A proton has a mass of 1.6 x 10-27 kg and moves at a speed of2.0 x 107 m1s perPelliITCular to a magnetic field with a magnitude of 0.1OT.
Find the magnitude of the
a£celeration of the proton. r-NA{ -c /111?
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