In Fig. 28.5, an irregular loop of wire carrying a current lies in the plane of

ID: 1388503 • Letter: I

Question

In Fig. 28.5, an irregular loop of wire carrying a current lies in the plane of the paper here. Suppose that now the loop is distorted into some other shape while remaining in the same plane. Point P is still within the loop. Which of the following is a true statement concerning this situation?

It is possible that the magnetic field at point P is zero. The magnetic field at P will not change in direction when the loop is distorted. The magnetic field at point P will not change in magnitude when the loop is distorted. The magnetic field at point P will always lie in the plane of the paper. None of these are true.

Explanation / Answer

The right answer is the last one.

Within a loop all point have a magnetic fiel different from zero.

The manetic field ao any point depend on the distance to the wire, if you chance the shape, you change the distances from any part of the wire and the point, then the magnetig field should change, and this menas that changes in magnitude and direction.

The magnetic field, usually has a component perpendicular to the plane of the loop.

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