When a coil is placed in a constant external magnetic field directed perpendicular to the plane of the coil, which of the following actions does not induce an emf in the coil?

moving the coil through the field without changing its orientation with respect to the field

removing the coil from the field

rotating the coil

collapsing the coil

changing the strength of the magnetic field

Question

Physics

Bentley Rogers

20 April, 08:35

When a coil is placed in a constant external magnetic field directed perpendicular to the plane of the coil, which of the following actions does not induce an emf in the coil?

moving the coil through the field without changing its orientation with respect to the field

removing the coil from the field

rotating the coil

collapsing the coil

changing the strength of the magnetic field

+1

Answers (1)

Know the Answer?

Rayne Macias · Answer 1

moving the coil through the field without changing its orientation with respect to the field

Explanation:

An emf can only be induced in the coil by whatever action that causes a change in the flux through the coil.

The following descriptions all change the flux through the coil and induce

an emf:

removing the coil from the field

rotating the coil

collapsing the coil

changing the strength of the magnetic field

However, moving the coil through the constant field without changing its orientation with respect to the field will not cause a change of flux. Hence the chosen answer.