As Shown Below, a Square Loop of Wire of Side

question 26

Multiple Choice

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 directed to the right. Judd says that the emf induced in the loop is zero. Roger claims that it has magnitude B . 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 Φ_B = 0.

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