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Electromagnetic force

Total questions: 22

Worksheet time: 25mins

Name
Class
Date
1.

Opposite poles of a magnet _____________

a)

attract

b)

repel

2.

A motor turns ____________ energy into ____________ energy.

a)

light, heat

b)

kinetic, electrical

c)

electrical, kinetic

d)

kinetic, light

3.

________________ is a force that pulls objects toward each other.

a)

friction

b)

acceleration

c)

glue

d)

Gravity

4.

A generator turns ____________ energy into ____________ energy.

a)

electrical, kinetic

b)

light, heat

c)

kinetic, electrical

d)

high, low

5.

Why does a compass needle point north?

a)

Because it is being attracted to the Magnetic South Pole

b)

Because north is up

c)

Because it is being attracted to the Magnetic North Pole

d)

Because north is down

6.
The picture is an example of an:
a)
Electric circuit
b)
Electromagnet
c)
Electric nail
d)
Electric power cell
7.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
8.

The entire region surrounding a magnet is known as the:

a)

Magnetic Domain

b)

Lodestone

c)

A Compass

d)

Magnetic Field

9.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
10.
How is Earth's magnetic field similar to that of a magnet?
a)
It is hundreds of miles long
b)
It has north and south poles
c)
It is made in Earth's core
d)
It is shaped like a horseshoe
11.
If two magnets come together what is it called?
a)
Repel
b)
Force
c)
Attract
d)
None of the Above
12.
If 2 magnets push away from each other what is it called?
a)
Attract
b)
Iron
c)
Repel
d)
None of the above
13.
Which way will the magnets move after they are released?
a)
Towards each other
b)
Away from each other
c)
Not enough information
14.

Bob and Suzy are designing an electromagnet. Bob wants to add another battery to make the magnet stronger, and Suzy wants to add more coils to make the magnet stronger. Who is correct?

a)

Bob

b)

Suzy

c)

Neither Bob nor Suzy

d)

Both Bob and Suzy

15.

A proton (positive charge) and electron (negative charge) are attracted to one another. This is due to...

a)

Gravitational fields

b)

Electrical fields

c)

Magnetic fields

d)

Track and field

16.

Which choice below shows a difference between gravitational fields, electrical fields, and magnetic fields?

a)

Gravitational fields are invisible, electrical and magnetic fields are visible.

b)

Gravitational fields can attract and repel, electrical and magnetic fields cannot.

c)

Gravitational fields involve positive and negative charges, electrical and magnetic fields involve poles.

d)

Gravitational fields can only attract, electrical and magnetic fields can both attract and repel.

17.

Which field deals with the attraction and repulsion of positive and negative charges?

a)

Gravitational

b)

Magnetic

c)

Alkaline

d)

Electrical

18.
The closer the charges, the ___________ the force between them
a)
closer
b)
further
c)
stronger
d)
weaker
19.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
20.
The closer the charges, the ___________ the force between them
a)
closer
b)
further
c)
stronger
d)
weaker
21.
A balloon has a negative charge.  The glass rod has a positive charge.  What will happen when the glass rod is brought near the balloon?
a)
The balloon will be attracted to the rod
b)
The balloon will be repelled by the rod
c)
The balloon will remain in place
d)
The balloon will spin in circles
22.

The electrical wires in many homes are made of copper and covered with plastic. Why are copper and plastic good choices for electrical wires?

a)

Copper is a conductor of electricity, and plastic is an insulator of electricity.

b)

Copper is an insulator of electricity, and plastic is a conductor of electricity.

c)

Copper is a conductor of electricity, and plastic is an insulator of heat.

d)

Copper is an insulator of electricity, and plastic is a conductor of heat.

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