1-5-6

Electrons are prevented from being pulled into the nucleus of an atom by ? force.

Centrifugal

The theory of magnetism states that each magnetic ? acts like a small permanent magnet.

Domain

Benjamin Franklin suggested the convention that opposite charges repel and like charges attract. True or False?

False

Graphite would fall under the paramagnetic classification of magnetic materials. True or False?

False

Some of the flux lines that leave a magnet's north pole are repelled and do not return to the south pole of the magnet. True or False?

False

The direction of the magnetic field around a current-carrying conductor can be determined by using the right-hand rule for conductors. True orFalse?

False

he cores of temporary magnets are usually made of steel. True or False?

False

The Greeks first discovered magnetism over 2,000 years ago when they noticed that a certain type of stone was attracted to ? . a.amber

Iron

Natural magnets were first known by the name ? .

Magnetite

When more magnetic domains of a material line up, the ? of the magnet is increased.

Strength

A material that retains its magnetic properties is called a permanent magnet, and one that loses this characteristic easily is called a ? magnet.

Temporary

If a magnet is free to move, the end that is attracted toward the north is called the north pole of the magnet. True or False?

True

Magnetic lines of flux never cross each other. True or Fasle?

True

Since the nucleus of an atom has a net positive charge and the electron has a negative charge, the electron is attracted to the nucleus. True or False?

True

The flux lines of a magnet leave the north pole and enter the south pole. True or False?

True

The strength of an electromagnet is directly proportional to its ampere-turns. True or False?

True

The three basic classifications of magnetic materials are ferromagnetic, paramagnetic, and diamagnetic. True or False?

True

The type of core material used in an electromagnet can increase the magnet's strength. True or False?

True

n magnetic materials, most or all of the magnetic domains are aligned. True or False?

True

The direction of current flow through the wire determines the ? of the magnetic field.

direction

Whenever an electric current flows through a conductor, a magnetic ? is formed around the conductor.

field

Magnetic lines of force are called lines of ? .

flux

The lines of force of a proton flow ? .

outward in all directions

The degree to which a material is able to focus lines of magnetic flux is called ? .

permeability

The opposition that materials present to the flow of magnetic lines of flux is called ? .

reluctance

The point at which the magnetic domains of a material are all lined up is called ? .

saturation

Increasing the number of loops will increase the ? of the magnetic field.

strength