Exam 4: Electricity, Magnetism, and Electromagnetism

A _____ uses direct current.

A charged particle in motion creates a(n)_____.

The smallest unit of electrical charge is the _____.

On the surface of an electrified object,the charges concentrate on the _____.

A _____ is a source of direct current.

Electrification occurs through the movement of _____.

An alternating (AC)current is represented by a _____ line.

Electrostatic force is _____ proportional to the distance between charges,and _____ proportional to the product of the charges.

An electric potential applied to a conductor produces _____.

Rubber and glass are _____.

When a group of dipoles are aligned,they create _____.

The magnetic intensity of an electromagnet is greatly increased by the addition of a(n)_____ core.

The force between magnetic poles is proportional to the _____ of the magnetic pole strengths,divided by the _____ of the distance between them.

Electrical power is measured in _____.

What is the SI unit of magnetic field strength?

The rotation of electrons on their axis is the property called _____.

Water is a _____ material.

What is Ohm's law?

In the United States,alternating current goes through a complete cycle every _____ second.

Alternating current is produced by a _____.