A Beka: Physics Quiz 35

The equation | ε_i | = N |Δϕ|/Δt is the formula for ? .

Faraday's law of induction

true

Flux linkage refers to the number of lines of flux that link a conducting loop.

electromotive force

In the equation, | ε_i | = | Δϕ |/ Δt, what does the variable ε_i stand for?

true

Lenz's law states that the current induced by a charge in flux linkage is directed so as to create a magnetic field to oppose the change.

false

The mere presence of a magnetic field is enough to induce a current in a coil.

true

The speed of relative motion between the conductor and magnetic field determines the amount of current.

eddy currents

What are tiny currents that produce small magnetic fields working against the rotating armature?

electric generator

What is any device which produces electric current by means of a conductor's motion through a magnetic field?

electromagnetic induction

What is defined as the generation of current by means of a conductor's motion through a magnetic field?

V

What is the unit of electromotive force?