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Electricity And Magnetism 2
Test Description: Questions about electricity and magnetism
Instructions: Answer all questions to get your test result.
1) When two objects have different electric charges, they
A
fall to Earth
B
start a fire
C
pull together
D
push apart
2) The purpose of insulation on an electric wire is to
A
resist the flow of electricity and light up
B
close the circuit and make electricity flow
C
make the electric current stay on its path
D
heat the wire and generate energy
3) Which of these substances is the best conductor of electricity?
A
rubber
B
metal
C
plastic
D
air
4) Electric current will flow through a circuit as long as the
A
charges are equal
B
wires are insulated
C
path is unbroken
D
switch is open
5) Which statement about a parallel circuit is correct?
A
The power source is always an electromagnet.
B
If one bulb is removed, the circuit will not work.
C
Each appliance or light has its own electrical path.
D
Only one appliance or light may be used at a time.
6) Frayed or broken insulation is dangerous because it can
A
cause a fire or electric shock
B
prevent electricity from flowing
C
cause the power to be cut off
D
turn a parallel circuit into a series circuit
7) A magnet is anything that
A
can create electricity
B
can pull iron and steel toward it
C
has positive and negative charges
D
is present in the earth's crust
8) If a magnet is allowed to swing freely, the north-seeking pole will point
A
south
B
up
C
down
D
north
9) The northern lights are caused when
A
the earth's magnetic poles change places
B
charged particles form a pattern around the earth's magnetic poles
C
the sun's energy becomes too intense and burns the forests in the far north
D
electric power is generated from nuclear energy
10) Electric current can be generated by
A
sliding a magnet back and forth through a coil of wire
B
harnessing the magnetic energy in the earth's atmosphere
C
capturing the flow of electricity with a meter
D
attaching a compass to a lodestone
*select an answer for all questions
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