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Magnetic Fields

Total questions: 20

Worksheet time: 5hrs 0mins

Name
Class
Date
1.

What does the following represent?

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

a)

Multiplied by a billion

b)

A piece of modern art

c)

Uniform magnetic field directed into the screen away from you

d)

Uniform magnetic field directed out of your screen at you

2.

Are the magnetic field lines in the picture correct?

a)

Yes, because they point from north to south.

b)

No, because they point from north to south (they're supposed to go the other way).

c)

Yes, because the North pole is on the left in all pictures.

d)

No, because the North pole is on the left in all pictures (it's supposed to be on the right).

3.

The strongest part of a magnet is...

a)

the bars .

b)

the force field.

c)

the poles.

d)

the middle.

4.
What does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
a)
A crowd with binoculars
b)
A bunch of coaxial cables 
c)
Uniform magnetic field directed into the screen away from you
d)
Uniform magnetic field directed out of your screen at you
5.
A north pole and a south pole will attract.
a)
True
b)
False
6.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
7.

The area of magnetic force around a magnet is known as its _____________.

a)

magnetic field

b)

magnetic declination

c)

magnetic fan lines

d)

magnetic tan lines

8.

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

a)

calculator

b)

ruler

c)

compass

d)

map

9.
what is the earths magnetic field useful for 
a)
deflecting the solar wind, charged particles that come from the Sun.
b)
wind
c)
sun
d)
light
10.
Magnetic field lines always cross.
a)
True
b)
False
11.
Ancient people discovered magnetic rocks called lodestone. What did they use them for?
a)
fires
b)
compasses
c)
sculptures
d)
weapons
12.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
13.
In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?
a)
There will be no interaction.  The poles of magnets do not have an effect on one another.
b)
The two north poles will attract each other
c)
The two north poles will repel each other
d)
The two magnets will combine and become one magnet
14.

Looking at the field lines in this picture, these two magnets are ________

a)

Attracting

b)

Repelling

c)

Attracting and Repelling

d)

Doing nothing

15.
Why are paper clips attracted to magnets?
a)
They contain silver.
b)
They contain aluminum
c)
They contain tin.
d)
They contain iron. 
16.

Which scientist found the key to Alternating current by rotating a magnet?

a)

Oersted

b)

Farraday

c)

Maxwell

d)

Tesla

17.

Which scientist created a mathematical formula to explain how a current is induced by a magnetic field?

a)

Oersted

b)

Farraday

c)

Maxwell

d)

Tesla

18.

Which scientist discovered the induced magnetic field of a current carrying wire by observing a compass?

a)

Oersted

b)

Farraday

c)

Maxwell

d)

Tesla

19.

Which scientist discovered a current can be induced by moving a magnet in a coil of wire?

a)

Oersted

b)

Farraday

c)

Maxwell

d)

Tesla

20.

Whose work did Maxwell build on when he wrote the mathematical formulas for which he is known?

a)

Oersted

b)

Farraday

c)

Edison

d)

Tesla