Electromagnetism Quiz
This quiz should be completed AFTER completing the Webquest.
1. What is electromagnetism?
A. It is a natural magnet
B. Magnetism occurring only in any conductor.
C. It is the flow of current through a coil of magnetic wire with a core of air or soft iron
D. Current flowing in an unmagnetized material.
2. What are the three parts of an electromagnet?
A. Iron core, magnetic wire, electric power source
B. Iron core, permanent magnet, electric power source
C. Natural magnet, iron core, copper
D. Electric power source, coil, and non magnetic material
3. The magnetic strength of an electromagnet depends upon three factors except
A. the amount of current passing through the coil
B. the number of turns of wire
C. the increase in time
D. the type of core material
4. Which of the following does NOT use the principle of electromagnetism?
A. Relay
B. Burglar alarm
C. Ammeter
D. Hydrometer
5. Which of the following materials is regarded as the least permeable?
A. Nickle
B. Cobalt
C. Air
D. Cast Iron
6. What is magnetic flux?
A. the pattern that the liens of force form
B. the space that the lines of force occupy
C. invisible lines of force
D. the total number of lines force
7. Soft iron is most suitable for use in
A. a permanent magnet
B. a natural magnet
C. a temporary magnet
D. magnet
8. What is permeability?
A. the opposition to the flow of current
B. the ability of a material to conduct voltage
C. the opposition to the lines of force
D. the ability of a material to conduct lines of force
9. In which device is soft iron most commonly used?
A. plastic core magnets
B. air core magnets
C. permanent magnets
D. electromagnets
10. Magnetism is defined as the
A. ability of a material to repel other magnetic material
B. ability of a material to attract other metals that have magnetic properties
C. ability of a material to store electric charge
D. ability of a material to give off heat
11. If you doubled the number of coils and doubled the voltage, what would be the increase in magnetic strength?
A. it would remain the same
B. it would be 4 times as strong
C. you can't increase magnetism by increasing the voltage
D. the strength would decrease
12. Why should the wire around the iron core be insulated?
A. so that you don't create a short circuit
B. to keep the iron from getting too warm
C. to insulate the magnetism
D. to trap the magnetic field
13. Why does an iron core increase the magnetic field of a coil wire?
A. the iron atoms line up to add to the magnetic field
B. iron attracts things, including magnetic fields
C. the iron core actually decreases the field, allowing it to be turned off
D. the iron core distorts the magnetic field
14. An electromagnet is regarded strongest
A. in the center
B. at the south pole
C. at the north pole
D. at the ends
15. Electromagnetism is used for the following application except
A. lifting magnets
B. transforming energy
C. storing energy
D. motor controllers
A. It is a natural magnet
B. Magnetism occurring only in any conductor.
C. It is the flow of current through a coil of magnetic wire with a core of air or soft iron
D. Current flowing in an unmagnetized material.
2. What are the three parts of an electromagnet?
A. Iron core, magnetic wire, electric power source
B. Iron core, permanent magnet, electric power source
C. Natural magnet, iron core, copper
D. Electric power source, coil, and non magnetic material
3. The magnetic strength of an electromagnet depends upon three factors except
A. the amount of current passing through the coil
B. the number of turns of wire
C. the increase in time
D. the type of core material
4. Which of the following does NOT use the principle of electromagnetism?
A. Relay
B. Burglar alarm
C. Ammeter
D. Hydrometer
5. Which of the following materials is regarded as the least permeable?
A. Nickle
B. Cobalt
C. Air
D. Cast Iron
6. What is magnetic flux?
A. the pattern that the liens of force form
B. the space that the lines of force occupy
C. invisible lines of force
D. the total number of lines force
7. Soft iron is most suitable for use in
A. a permanent magnet
B. a natural magnet
C. a temporary magnet
D. magnet
8. What is permeability?
A. the opposition to the flow of current
B. the ability of a material to conduct voltage
C. the opposition to the lines of force
D. the ability of a material to conduct lines of force
9. In which device is soft iron most commonly used?
A. plastic core magnets
B. air core magnets
C. permanent magnets
D. electromagnets
10. Magnetism is defined as the
A. ability of a material to repel other magnetic material
B. ability of a material to attract other metals that have magnetic properties
C. ability of a material to store electric charge
D. ability of a material to give off heat
11. If you doubled the number of coils and doubled the voltage, what would be the increase in magnetic strength?
A. it would remain the same
B. it would be 4 times as strong
C. you can't increase magnetism by increasing the voltage
D. the strength would decrease
12. Why should the wire around the iron core be insulated?
A. so that you don't create a short circuit
B. to keep the iron from getting too warm
C. to insulate the magnetism
D. to trap the magnetic field
13. Why does an iron core increase the magnetic field of a coil wire?
A. the iron atoms line up to add to the magnetic field
B. iron attracts things, including magnetic fields
C. the iron core actually decreases the field, allowing it to be turned off
D. the iron core distorts the magnetic field
14. An electromagnet is regarded strongest
A. in the center
B. at the south pole
C. at the north pole
D. at the ends
15. Electromagnetism is used for the following application except
A. lifting magnets
B. transforming energy
C. storing energy
D. motor controllers