Magnetic Effects.

traveling in opposite directions tend to unite with each other

and form into single lines traveling in a direction determined

by the magnetic poles creating the lines of force.

(d) Magnetic lines of force tend to shorten themselves.

Therefore, the magnetic lines of force existing between two

unlike poles cause the poles to be pulled together.

(e) Magnetic lines of force pass through all materials, both

magnetic and nonmagnetic.

(f) Magnetic lines of force always enter or leave a magnetic

material at right angles to the surface.

e. Magnetic Effects.

(1) Magnetic Flux. The total number of magnetic lines of

force leaving or entering the pole of a magnet is called

MAGNETIC FLUX. The number of flux lines per unit area is known

as the FLUX DENSITY.

(2) Field Intensity. The intensity of a magnetic field is

directly related to the magnetic force exerted by the field.

(3) Attraction/Repulsion. The intensity of attraction or

repulsion between magnetic poles may be described by a law

almost identical to Coulomb's Law of Charged Bodies. The force

between two poles is directly proportional to the product of the

pole strengths and inversely proportional to the square of the

distance between the poles.

(4) Magnetic Induction. Magnetism can be induced in a

magnetic material by several means. The magnetic material may

be placed in the magnetic field, brought into contact with a

magnet, or stroked by a magnet. Stroking and contact both

indicate the actual conduct of the material but are considered

in magnetic studies as magnetizing by INDUCTION.

It has been previously stated that all substances that are

attracted by a magnet are capable of becoming magnetized. The

fact that a material is

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