A student says: \"If a rectangular loop of wire is pulled into a region where th

Question

A student says: "If a rectangular loop of wire is pulled into a region where there is a uniform magnetic field, the current will increase as more of the loop gets into the field since there will be more flux inside the loop." Suppose the closed loop of wire in question I is replaced by an open loon as shown. Consider the following statements. "An open rectangular loop will have an emf across the gap when moving into or out of a uniform magnetic field." "An open rectangular loop will have an emf across the gap anytime it is anywhere in the region of the magnetic field." An open rectangular loop will have an emf across the gap only when moving inside the region of the magnetic field." "An open rectangular loop will have an emf across the gap because there is a break in the loop."

Explanation / Answer

student A is correct because if loop is moving through a uniform magnetic field there is change in flux with respect to time . due to this time varing magnetic field emf is induced in the loop so emf induced acroos the gap.

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