Magnetism

Poll

• Great

• Not so good

• Sleepy

• I don't want to be here

Multiple Choice

Magnetism is a property of current

• True

• False

Multiple Choice

A one-dollar coin is said to be magnetic.

• True

• False

Fill in the Blanks

The baic features of a magnets are flux lines, the field, energy and

.

Multiple Choice

Magnetic material, such as iron, can be considered to have magnetic domains but the domains are not in order and thus point in random directions

• True

• False

Multiple Choice

Opposite poles repel each other.

• True

• False

Multiple Choice

Three ways to demagnetized a magnet are

• 1. Heating it

  2. Hammering

  3. Placing the magnet in a coil supplied by a large alternating current

• 1. Freezing it

  2. Hammering

  3. Placing the magnet in a coil supplied by a large alternating current

• 1. Heating it

  2. Stroking it with a permanent magnet

  3. Placing the magnet in a coil supplied by a large alternating current

• 1. Heating it

  2. Hammering

  3. Placing the magnet in a coil supplied by a direct current

Fill in the Blanks

The iron or magnetic steel plates that connect the poles of the magnets when storing them are called

.

Multiple Choice

The magnet found in a speaker is said to be

• Magnetically Hard

• Magnetically soft