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