Question

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?

Answer 1

Answer:

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