MAGNETS AND MAGNETIC FIELD QUIZ

When a magnetizing force is removed from a material, the kind of magnetism that remains is called

• strong.

• weak.

• residual.

• electromagnetism.

• flux.

The kind of magnet that is made by wrapping a coil of wire around a bar of steel is called

• a permanent magnet.

• an electromagnet.

• a transformer.

• a pole magnet.

Magnetic lines of force are known as __________

• induction.

• poles.

• attracting influences.

• flux

Flux density is an indication of __________

• repulsion.

• an electromagnet.

• a permanent magnet.

• field strength.

• a temporary magnet.

The magnetism present in a piece of soft steel held near a magnet is called __________

• induced magnetism.

• residual magnetism.

• insulated magnetism.

• electromagnetism.

• permanent magnetism.

The number of lines of force per CSA is a measure of __________

• magnetic flux density.

• magnetic intensity.

• the laws of magnets.

• flux.

• flux patterns.

Magnetic properties are possessed by __________

• iron and steel only.

• nickel, cobalt, and gadolinium only.

• the materials stated in (a) and (b) only.

• hard and soft steel only.

• all materials.

Magnetic lines of force __________

• can be insulated with air.

• pass through the magnet.

• form loops that mix and cross.

• exist only in temporary magnets.

• emerge from the S pole.