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Electricity And Magnetism
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Where does all the electricity we use come from?
A
lightning
B
insulated metal wires
C
generators in power plants
D
atoms wiht charged particles
2) Which kind of atom has an electrical charge?
A
an atom with an equal number of electrons and protons
B
an atom with a different number of electrons and protons
C
an atom with a different number of neutrons and electrons
D
an atom with an equal number of electrons, protons, and neutrons
3) Which important force includes both electricity and magentism?
A
electromagnetism
B
magnoelection
C
magnoelectricity
D
electric-magnetic energy
4) Lightining is an example of ________________.
A
insulation
B
static electricty
C
electric current
D
magnetism
5) What are amps, volts, and watts?
A
devises that deliver electricity
B
units used for measuring electricity
C
machines that make electricity
D
three ways to make magnets spin inside a generator
6) Why does a lamp stop working if its power cord comes loose?
A
The loose cord touches metal, so the current flows faster and faster.
B
The loose cord makes the electrons move rapidly back and forth.
C
The loose cord breaks the circut, so the current can't flow.
D
The loose cord makes the electrons slow down.
7) Why do electric power cords have metal wires inside?
A
metal is a good conductor
B
Metal is magnetic
C
metal is a good insulator
D
metal bends easily
8) Sometimes the ground and the the clouds have strong, opposite charges. What does charges mean in the sentence?
A
forward movements made during an attack
B
accusations made against a person
C
prices paid for products or services
D
matter is that is electrically postitive or negative
9) If you wanted to use one magnet to pick up another magnet, what shoud you do?
A
demagnetize both magnets so netiher one has a north or south pole
B
touch the first magets south pole to the second magets south pole
C
touch the first magets's norht pole to the second magetcs north pole.
D
touch the first magets north pole to the second magets south pole
10) How can you tell that magnetism and electricity are very closely related?
A
each force can be used to produce the other force
B
both forces were discoverd by the same person
C
both forces are used in homes, schools, and businesses
D
each force can be found in nature
*select an answer for all questions
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