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Forces Chapter 7
Test Description: This should help you review for your test
Instructions: Answer all questions to get your test result.
1) In a bar magnet spreads out from one pole and curve around to the other?
A
Magnetic field lines
B
Field Lines
C
Electricity Lines
D
Electromagnetic field lines
2) What does every magnet have ?
A
Magnetic Poles
B
Positive and negative end
C
New and old end
D
Silver
3) When magnet poles are unlike they?
A
Move together
B
Don't do anything
C
Repel
D
Attract
4) The armature spins continuously in a what?
A
Magnet
B
Galvanometer
C
Electric Motor
D
Battery
5) To change the direction of current in a motor, current is conducted
A
in the direction of rotation.
B
through the armature.
C
by the field lines.
D
through the brushes to the commutator.
6) Which of the following uses direct current?
A
Refrigerator
B
Microwave
C
Battery
D
TV
7) If you use a stronger ferromagnet (nail) in the core, you will increase what?
A
The strength of a clock
B
The strength of electricity
C
The strength of a magnet
D
The strength of an electromagnet
8) As Earth's magnetic poles move, the magnetic declination in a given location will do what?
A
Change
B
Move towards the west
C
Stay the same
D
Move towards the east
9) A magnetic field is produced when there is what?
A
Strong magnets
B
Electric current
C
Battery
D
Magnet
10) How is electric current from a generating plant transmitted?
A
Through direct current transmitted at low voltages, but usually used at high voltages
B
Through direct current transmitted at high voltages, but usually used at low voltages
C
Through alternating current transmitted at low voltages, but usually used at high voltages
D
Through alternating current transmitted at high voltages, but usually used at low voltages
11) A maglev (monorail) train floats above its rails due to what?
A
Magnetism
B
Magnetic Field Lines
C
Electricity
D
Currents
12) A galvanometer is a device that measures small what?
A
magnetism
B
currents
C
magnetic field lines
D
electricity
13) An alternating currents is induced when a wire moves up or down repeatedly in a what?
A
Magnet
B
Current
C
Magnetic Field
D
Field Lines
14) What does a step-up transformer increase?
A
Amperage
B
Noise
C
Movement
D
Voltage
15) What's a strong magnet that can be turned on and off?
A
Motor
B
Current
C
Electromagnet
D
Switch
16) Where is the magnetic effect the strongest?
A
In the middle
B
North Pole
C
At it's poles
D
South Pole
17) What acts as a giant magnet?
A
Moon
B
Mars
C
Earth
D
Sun
18) Magnets are attract to what metal?
A
Gold
B
Silver
C
Cobalt
D
Iron
19) What is electromagnetic induction?
A
Is creates electric current through motion of a magnetic field. In transformers, DC switches from one coil to another.
B
Is creates electric current through motion of a electric field. In transformers, AC switches from one coil to another.
C
Is creates electric current through motion of a magnetic field. In transformers, AC switches from one coil to another.
D
Is creates electric current through motion of a electric field. In transformers, DC switches from one coil to another.
*select an answer for all questions
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