Question

Question 3
Match the following particles with the correct overall charge.

Column A
1.
proton:
proton
2.
electron:
electron
3.
neutron:
neutron
Column B
a.positive
b.negative
c.neutral
Question 4
Roger wants to use a magnet to pick up a sheet of metal, but his magnet is too far away to attract. What is a possible solution?

a
Get a bigger magnet, because the magnetic field will be larger.
b
Turn the magnet around and use the opposite pole instead.
c
Get a smaller magnet, because the magnetic field will be smaller.
d
Turn the magnet so that the middle is pointed toward the metal.
Question 5
Magnetic fields always run from:

a
north to south
b
north to north
c
south to north
d
south to south
Question 6
A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is called a(n)

a
a ferromagnet
b
an electromagnet
c
a permanent magnet
d
a temporary magnet
Question 7
An object with a charge of 1.2x10-11 and another object with a charge of -3.7x10-11 are held in close proximity. Will these two objects attract or repel?

a
Attract
b
Repel
c
The objects will not attract or repel
d
Not enough information
Question 8
Which of the following will decrease the electrical force between two charges? (Select all that apply)

a
decreasing the distance between the charges
b
decreasing the size of the charges
c
increasing the distance between the charges
d
increasing the size of the charges
Question 9
A student wants to increase the magnetic force between two bar magnets. What should the student do?

a
Move the magnets farther apart.
b
Move the magnets closer together.
c
Make the north poles face each other.
d
Make the south poles face each other.
Question 10
Persons with medically implanted metal devices can undergo an MRI, an imaging technology using a giant magnet, with no problem.

True
False
Question 11
What can demagnetize a magnet? (Select all that apply)

a
high temperatures
b
dropping from high height
c
low temperatures
d
high altitudes
Question 12
What is the unit for work?

a
Joule
b
Newton
c
Watt
d
Coulomb
Question 13
What is the only force acting on an object in free fall? (neglecting air resistance)

a
acceleration
b
gravity
c
terminal velocity
d
magnetism

Answer 1

Question 3
1 → a (proton: positive)
2 → b (electron: negative)
3 → c (neutron: neutral)

Question 4
a (Get a bigger magnet, because the magnetic field will be larger.)

Question 5
a (north to south)

Question 6
b (an electromagnet)

Question 7
a (Attract)

Question 8
b and c (decreasing the size of the charges; increasing the distance between the charges)

Question 9
b (Move the magnets closer together.)

Question 10
False

Question 11
a and b (high temperatures; dropping from high height)

Question 12
a (Joule)

Question 13
b (gravity)