The relative ____ wire and magnetic field always induces a voltage, or emf.
A)friction between
B)motion of
C)magnetism of
D)currents between

Question

Quizplus · Accepted Answer

The relative motion of a wire and magnetic field always induces a voltage or emf because a magnetic field can cut across a conductor to create a change in the magnetic flux. This change in flux induces an emf, which causes a current to flow in the conductor if it is part of a closed circuit. Friction between two surfaces or currents flowing between wires do not necessarily induce a voltage. Magnetism of a wire is not a physical process and does not make sense in this context.

The Relative ____ Wire and Magnetic Field Always Induces a Voltage