As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity

image directed to the right. Judd says that the emf induced in the loop is zero. Roger claims that it has magnitude image
. Which one, if either, is correct, and why?
?
?

?
 
a.
Judd, because the magnetic flux through the loop is constant.
 
b.
Roger, because the magnetic flux through the loop is constant.
 
c.
Judd, because the magnetic flux through the loop is not constant if .
 
d.
Roger, because the magnetic flux through the loop is not constant if .
 
e.
Roger, because the magnetic flux through the loop is ?B = 0.


a

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