Three wires 0.6[m] long are bent into loops : one is 0.150[m] square, one is 0.1

Question

Three wires 0.6[m] long are bent into loops : one is 0.150[m] square, one is 0.100×0.200[m] rectangle, and one is 0.191[m] dia circle. These start flat on a lab table, in an upward 0.5[T] magnetic field, then are flipped over in ¼[s]. Which loop has the greatest induced emf while being flipped? How many times as much as the least emf?
Answer a. the square's is 1.273× the circle's
b. the square's is 2.793× the circle's
c. the square's is 1.273× the rectangle's
d. the rectangle's is 1.432× the circle's
e. the rectangle's is 1.273× the square's
f. the circle's is 5.73× the rectangle's
g. the circle's is 1.432× the rectangle's
h. the circle's is 1.273× the square's
i. All three would have the same induced emf

Explanation / Answer

the induced emf in the circle has the highest value and is 1.432 times that of the lowest(rectangle has the lowest).. therefore the corret answer is g)

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