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WorksheetsElectricity and Magnetism
Total questions: 20
Worksheet time: 17mins
Name
Class
Date
1.
The number of positive and negative charges in an atom is USUALLY...
a)
equal.
b)
unequal.
c)
empty.
2.
Lightning is caused by...
a)
a build up of positive and negative charges in the clouds.
b)
clouds bumping into each other.
c)
too much energy from the sun.
3.
A device that uses a free-moving magnetic needle to show direction is a:
a)
lodestone
b)
magnet
c)
compass
d)
magnetic field
4.
A compass _______ is the part of a compass that is magnetic.
a)
bar
b)
dial
c)
needle
d)
rose
5.
Why are magnetic poles called north and south?
a)
because the needle points up and down
b)
because it lines up with Earth's axis
c)
because magnets help with direrctions
d)
because it sounds cool
6.
What causes electricity?
a)
moving neutrons
b)
moving protons
c)
moving atoms
d)
moving electrons
7.
What type of electricity occurs when you rub a balloon on your sweater?
a)
thermal electricity
b)
current electricity
c)
static electricity
d)
work electricity
8.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
The doorknob sends a burst of electric current into your body
b)
Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
Your finger becomes negatively charged
9.
Lightning is a form of static electricity. What can you infer about what happens when lightning strikes the ground?
a)
Protons and neutrons are transferred from the clouds to the ground
b)
The ground becomes negatively charged
c)
. Electrons are transferred from the clouds to the ground
d)
An electric current is established between the clouds and the ground
10.
The movement of electrically charged particles is
a)
electric current
b)
electric circuit
c)
electric resistance
11.
Which of the following is unsafe?
a)
Using a surge protector when you have a lot of devices to plug into one outlet.
b)
Replacing a blown fuse with a fuse that has the same current
c)
Resetting a breaker box after a circuit breaker trips
d)
Using multiple extension cords on one outlet
12.
To have an electric current when using batteries, there MUST be a _________.
a)
switch
b)
light bulb
c)
motor
d)
complete circuit
13.
When electricity moves through a metal wire, the wire is _________.
a)
An insulator
b)
A conductor
c)
A generator
d)
A multiplier
14.
What would you expect to find inside an electromagnet?
a)
A coil of wire
b)
A permanent magnet
c)
Two bar magnets
d)
A generator
15.
What is the advantage of using electromagnets instead of bar magnets?
a)
Electromagnets can be turned on and off
b)
Electromagnets save electricity
c)
Electromagnets are cheaper to make
16.
Which type of magnets have a magnetic field?
a)
Bar magnets
b)
Electromagnets
c)
All of the above
d)
None of the above
17.
Which kind of magnet carries a current?
a)
Permanent magnet
b)
Electromagnet
c)
Bar magnet
d)
Horseshow magnet
18.
If an object has an equal amount of positive and negative charges it is called ________.
a)
Positive
b)
Negative
c)
Neutral
d)
Nothing
19.
Which of the following demonstrates static electricity?
a)
You know you should never put your fingers into an electrical outlet. You could get shocked.
b)
You bend a paper clip back and forth until it breaks. The broken ends feel hot.
c)
You brush your hair on a cold, dry day. Your hair springs away from your head and sticks out in all directions.
d)
You use a charger to charge batteries for a digital camera.
20.
The diagram shows an electric circuit. Which explains why this circuit will NOT work?
a)
It has no energy source.
b)
It has no energy conductor.
c)
The energy receiver is too small.
d)
The energy pathway is not closed
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