Quiz 5
Section:
Phys 222, Fall 2013
Name:
Problem 1.(2 points.) A positive charge is moving through a uniform magnetic field.
What would happen to the radius if we doubled the charge?
A) doubles
B) remains the same
C) reduces by a half
D) increases by a factor of four
Problem 2.(2 points.) Current I flows through two wires as shown below. The force
between the wires is
A) zero
B) repulsive
C) attractive
D) cannot be determined from the given information
Problem 3.(1 points.) A wire carries current I as shown below, in +ŷ direction. The
magnetic field at point P points
A) up
B) down
C) out of the page
D) into the page
E) left
F) right
Extra credit(1 points.) Write down the SI units for
A) The electric force
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B) The magnetic force
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C) Power
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D) Work
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