# Trivia: Quiz On Electricity And Magnetism!

18 Questions | Total Attempts: 785  Settings  .

Related Topics
• 1.
A measure of a material's ability to retain magnetism.
• A.

Flux Density

• B.

Coercive Force

• C.

Flux Lines

• 2.
Magnetic strength is measured in flux density.
• A.

True

• B.

False

• 3.
Reluctance
• A.

Is resistance to magnetism.

• B.

Is a variable resistor used as a voltage divider.

• C.

Is a measure of a materials ability to become magnetized.

• 4.
Occurs when all the molecules of the magnetic materials are lined up
• A.

Ampere-Turns

• B.

Reluctance

• C.

Saturation

• 5.
Ampere-Turns are determined by multiplying the number of turns of wire by the current flow.
• A.

True

• B.

False

• 6.
The amount of magnetism left in a material after the magnetizing force has stopped.
• A.

Residual Magnetism

• B.

Potentiometer

• C.

Saturation

• 7.
Permeability is a measure of a materials ability to become demagnetized
• A.

True

• B.

False

• 8.
Flux Lines
• A.

Magnetic lines of force are called flux

• B.

Magnetic lines of flux repel each other and never cross

• C.

They do not flow but are always assumed to be in the North and South directions

• D.

All the above

• 9.
Natural Magnetic is called
• A.

Lodestones

• B.

• C.

• D.

All the above

• 10.
Resistors:
• A.

Limit the flow of current in a circuit and are voltage dividers

• B.

Are voltage dividers and have high power ratings

• C.

Have higher power ratings and limit current flow

• D.

All the above

• 11.
Have higher power ratings, should be mounted vertically.
• A.

Metal film resistors

• B.

Carbon film resistors

• C.

Wire-wound Resistors

• 12.
A potentiometer is a variable resistor used as a voltage divider.
• A.

True

• B.

False

• 13.
Metal Film Resistor:
• A.

Have a higher tolerance

• B.

Must be mounted vertically

• C.

Don’t change value with age

• D.

All the above

• 14.
Demagnetizing occurs by:
• A.

Being struck

• B.

Holding another magnetic close

• C.

Cooling

• D.

An AC unit with a power connection

• E.

Heating

• F.

Smashing with a sledge-hammer

• G.

A strong electromagnetic connected to an AC line

• 15.
Left-handed Rule if the direction of current flow is reversed, the polarity of the magnetic field is not reversed.
• A.

True

• B.

False

• 16.
Energy is required to create a magnetic field, but no energy is required to maintain a magnetic field.
• A.

Permanent Magnetics

• B.

Residual Magnetism

• 17.
Magnetic Materials:
• A.

Ferromagnetic Materials – easily magnetized

• B.

Paramagnetic Materials – can be magnetized but not as easily.

• C.

Diamagnetic Materials – cannot be magnetized.

• D.

All the above

• 18.
Basic Law of Magnetism unlike poles _______ and like poles ________.
• A.

Repel and Attract

• B.

Repel and Repel

• C.

Attract and Repel

• D.

Attract and Attract