Exam 1: Electric Induction Theory

Lenz's Law states that an induced voltage will be the opposite polarity as the electrical source voltage that created it.

____________________ is the difference in time between when the voltage was applied to the inductor coil and current started to flow through the coil.

CEMF (counter electro-motive force) is sometimes called counter ____________________.

The term ____ is a common term used to describe that the strength of the electro-magnetic field is determined by the number of wire turns in the coil, and the intensity of current flow through the coil.

A coil of wire is a series circuit, meaning that the current flow would be ____ throughout the entire coil, and so would the magnetic behaviors associated with current flow.

Mutual induction is when more than one inductor coil is mounted on a common ____ core.

The three properties that determine the strength of any electro-magnet are intensity of current flow, number of wire turns in the coil and ____.

The greater the magnetic flux density, the lower the induced voltage will be.

Describe Lenz's Law.

The principle of electro-magnetism states that electrical current flows through an electrical ____, a magnetic field will be created.

The principle of electro-magnetism states that when an electrical current flows through an electrical conductor, a magnetic field will be created around that conductor.

What is the difference between resistance and reactance?

The term ____ means that there is only one wire coil that both the principle of electro-magnetism and the principle of electro-magnetic induction act on..

Three factors that are required to be present for electro-magnetic induction to occur are an electrical conductor, magnetic lines of flux and ____.

The strength of the magnetic field created by an electromagnet is determined by the magnetic polarity.

Ohm's Law verifies that voltage and current are ____ in a resistive circuit.

Resistance and ____________________ are two properties in an inductor that oppose current flow.

"Opposing a change in current" means the inductors will ____ the current flow through the inductor.

The magnetic polarity of an electromagnetic field is determined by the direction of current flow through the coil.

When an inductor coil is energized with a source voltage, the voltage will distribute itself across all the wire turns of the energized coil is called ____.