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Physical Science
Test Description: Electricity
Instructions: Answer all questions to get your test result.
1) Why is a dam wider at the bottom?
A
gravity
B
that's where the pressure is greatest
C
it's easier to build one that way
D
concrete is heavy
2) What is an example of direct current ?
A
lightning
B
a battery
C
a wall outlet
D
a campfire
3) Which is NOT true ?
A
neutrons have no charge
B
electrons have a negative charge
C
protons have a positive charge
D
an atom's nucleus will have a negative charge
4) If you walk across carpet and touch a doorknob you may get shocked.This would be from
A
static electricity
B
the earth's magnetism
C
direct current
D
your body's electricity
5) Which would Not be an insulator?
A
water
B
padded cloth
C
rubber
D
dry wood
6) Which is an example of alternating current ?
A
wall outlet plug in
B
car battery
C
flashlight battery
D
hearing aid battery
7) Which would protect a system from an electrical accident?
A
insulators
B
All of these
C
a circuit breaker
D
a fuse
8) Which would be the Best conductor of electricity ?
A
a copper wire
B
plastic
C
air
D
aluminum foil
9) Electric current is measured in
A
amps
B
newtons
C
ohms
D
volts
10) Birds are Not electrocuted on high voltage wires because they
A
are covered with feathers
B
it is not raining
C
are not touching each other
D
are not touching anything but the wire they are sitting on
11) Which is NOT true ?
A
electricity flows to the ground
B
lightning carries around 300 million volts
C
the resistance in all wires is the same
D
electricity is either AC or DC
12) The resistance in a wire is measured in
A
watts
B
amps
C
volts
D
ohms
*select an answer for all questions
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