Three loops of wire,one circular,one rectangular,and one square,are made from identical lengths of wire.If the loops are in the same increasing magnetic field perpendicular to the plane of the coils,which loop has the greatest induced emf?
A)the circular one
B)the rectangular one
C)the square one
D)All three would have the same emf induced.

Question

Quizplus · Accepted Answer

The circular loop has the greatest area compared to the rectangular and square loops, which means it will have the greatest magnetic flux through it. According to Faraday's law of electromagnetic induction, the induced emf is proportional to the rate of change of magnetic flux. Therefore, the circular loop will have the greatest induced emf. Since all three loops are made from identical lengths of wire, they have the same resistance, so the circular loop will also have the greatest current flowing through it.

Three Loops of Wire,one Circular,one Rectangular,and One Square,are Made from Identical