2-4-1

The letter ? is used in calculations to represent inductance.

"L"

The induced voltage is ? out of phase with the applied voltage.

180 degrees

Maximum EMF is induced when a conductor cuts a magnetic field at ? .

90° and 270°

Cutting more magnetic lines of force per second will increase the amount of voltage induced into a conductor.

True

Another term for counter EMF is ? EMF.

back

Whenever ? flows through a conductor, a magnetic field is created.

curent

If an iron core is inserted into a coil, the inductance of the coil will decrease.

false

If the current flowing through a conductor decreases, the magnetic field around the conductor will increase.

false

Moving a magnetic field across a stationary conductor will not induce a voltage in the conductor

false

The unit of inductance is called the ? .

henry

The ability of a current-carrying conductor, coil, or circuit to induce a voltage into itself or adjacent circuits is called ? .

inductance

The ability of a moving or changing magnetic field to induce a voltage into a conductor is called ? .

inductance

A coil of wire wrapped around a core is called a(n) ? .

inductor

The flux lines that do not link to all the other coils do not contribute to the total inductance, and are called ? flux.

leakage

The ability of one coil to induce a voltage into another coil is called ? induction.

mutual

A transformer operates under the principle of ? .

mutual induction

When there is no current flowing through a conductor, the magnetic field around the conductor is ? .

not present

The ability of a material to focus, or concentrate, magnetic lines of force is called magnetic ? .

permeability

When a conductor that is cutting through a magnetic field changes direction, the ? of the induced voltage will be reversed.

polarity

When a coil induces a voltage into itself, it is known as ? inductance.

self

For a voltage to be induced in a conductor, there must be relative motion between the conductor and a magnetic field.

true

Inductance has no effect on a DC circuit as long as the current is constant.

true

Lenz's Law states, "An induced voltage or current opposes the motion that created the induced voltage or current."

true

The inductance of a coil is directly related to the number of turns of wire that make up the coil.

true