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Electricity And Magnetism
Test Description: Science Test
Instructions: Answer all questions to get your test result.
1) Where does all the electricity we use come from?
A
insulated metal wires
B
lightning
C
atoms with charged particles
D
generators in power plants
2) Which important force includes both electricity and magnetism?
A
electric-magnetic energy
B
magnoelectricity
C
electromagnetism
D
magnoelection
3) Lightning is an example of _____.
A
static electricity
B
electric current
C
magnetism
D
insulation
4) Which kind of atom has an electrical charge?
A
an atom with an equal number of electrons, protons, and neutrons
B
an atoms with an equal number of electrons and protons
C
an atom with a different number of neutrons and electrons
D
an atom with a different number of electrons and protons
5) What are amps, volts, and watts?
A
three ways to make magnets spin inside a generator
B
units used for measuring electricity
C
machines that make electricity
D
devices that deliver electricity
6) Why does a lamp stop working if its power cord comes loose?
A
The loose cord breaks the circuit, so the current can’t flow.
B
The loose cord touches metal, so the current flows faster and faster.
C
The loose cord sends a power surge, and the lightbulb burns out.
D
The loose cord makes the electrons move rapidly back and forth.
7) What kind of material do people use to send electricity to a computer, and why?
A
They use rubber because it is flexible.
B
They use a magnet because it pulls the electricity from the wall to the computer.
C
They use metal because it is a good conductor.
D
They use plastic because it is a good insulator.
8) How can you tell that magnetism and electricity are very closely related?
A
Both forces are used in homes, schools, and businesses.
B
Both forces were discovered by the same person.
C
Each force can be used to produce the other force.
D
Each force can be found in nature.
9) Which of the following could be an electrical safety problem?
A
using an electrical supply with very high voltage
B
using electrical wires without insulation
C
all
D
poking a piece of metal into a wall outlet
10) If you wanted to use one magnet to pick up another magnet, what should you do?
A
Touch the first magnet's south pole to the second magnet's south pole.
B
Touch the first magnet's north pole to the second magnet's south pole.
C
Demagnetize both magnets so neither one has a north or south pole.
D
Touch the first magnet's north pole to the second magnet's north pole.
11) To make a neutral atom have a positive charge, it would have to
A
lose some electrons
B
pick up extra protons
C
lose some protons
D
pick up extra electrons
*select an answer for all questions
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