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