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Electromagnetism
Test Description: SPI 0807.12.1
Instructions: Answer all questions to get your test result.
1) A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity?
A
The student insulates the copper wire with plastic.
B
The student connects the copper wire to a light bulb.
C
The student moves the bar magnet through the copper wire coils.
D
The student uses a horseshoe magnet instead of a bar magnet.
2) Which is best used with a bar magnet to produce an electric current?
A
metal coins
B
paper clips
C
wire coils
D
silver pins
3) Which is generated when a bar magnet is moved through a solenoid?
A
thermal energy
B
gravitational field
C
mechanical energy
D
electric current
4) Solenoids spinning between two magnets will produce...?
A
steams
B
cold
C
chemicals
D
electricity
5) What is the invisible force a magnet uses to attract or repel objects?
A
Magnetic Force
B
The Force it is called
C
Magnetic Field
D
Push - Pull Force
6) Where is the magnetic force the strongest in magnets?
A
Poles
B
Top
C
Sides
D
Bottom
7) When you have 2 North sides of the magnets together what will happen?
A
Attract - Pull Toward
B
Spin in Circles
C
Repel - Push Away
D
Nothing
8) When you have a North and South Poles of magnets together what will happen?
A
Spin in Circles
B
Nothing
C
Repel - Push Away
D
Attract - Pull Toward
9) What is another word for coil of wire?
A
solenoid
B
spring
C
slinky
D
circuit
10) How can you increase the production of electricity in an electromagnet?
A
Turn the switch up
B
Uncoil the wire completely
C
Decrease number of coils, and slow down movement of magnet between solenoid
D
Increase number of coils, and speed of movement of magnet between solenoid
11) What does Earth's Magnetic Domain resemble?
A
Circle Magnet
B
Line Magnet
C
Horseshoe magnet
D
Bar Magnet
12) How can you increase the strength of an Electromagnet?
A
Turn the power up
B
Decrease the battery size
C
Decrease the solenoids
D
Increase the solenoids
13) What do you put inside the solenoid of an Electromagnet?
A
Plastic nail
B
Rubber nail
C
Iron nail
D
Copper nail
14) The magnetic domain is the strongest when...
A
the lines are far apart
B
the lines are curvey
C
the lines are straight
D
the lines are close together
15) Which of the following uses a magnet to produce electricity?
A
Generator
B
Engine
C
Fan
D
Motor
*select an answer for all questions
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