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​Exponential curves are always divided into _____ time constants.

Using Fleming’s left-hand generator rule, which shows the direction of the current induced into the armature?

An inductor has a maximum current flow of 1.25 amperes. When power is first applied to the inductor, how much current will flow at the end of the fourth time constant?

An inductor has a maximum current of 4 amperes. When power is interrupted, how much current will flow at the end of the third time constant?

What is a coil wound on a magnetic core material, such as silicon steel?

The important factors concerning _____________ are a conductor, a magnetic field, and relative motion.

When a closed loop of wire cuts through magnetic flux lines, a current is induced into the loop. The current in the loop sets up a magnetic field that is in opposition to the original magnetic flux. This is essentially _____.

If current is flowing in a circuit containing an inductor and the power switch is opened, the magnetic field surrounding the inductor collapses and induces voltage into the inductor, resulting in a voltage spike.

The ___________ can be used to clearly illustrate that if the polarity of the magnetic field is changed or if the direction of armature rotations is changed, the direction of induced current also changes.

Which has more inductance?