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15 October, 11:42

A circular flat coil that has N turns, encloses an area A, and carries a current i, has its central axis parallel to a uniform magnetic field B in which it is immersed. The net force on the coil is

-Zero

-NiAB

-NiB

-NiA

-iBA

Is the answer zero because the coil is placed parallel to the magnetic field?

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Answers (1)
  1. 15 October, 14:12
    0
    A. Zero

    Explanation:

    The force on a coil of N turns, enclosing an area, A and carrying a current I in the presence of a magnetic field B, is:

    F = N * I * A * B * sinθ

    Where θ is the angle between the normal of the enclosed area and the magnetic field.

    Since the normal of the area is parallel to the magnetic field, θ = 0

    Hence:

    F = NIABsin0

    F = 0 or Zero
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