WorksheetsScience Ch. 8 Test Electric and Magnetic Forces
Total questions: 17
Worksheet time: 9mins
The buildup of nonflowing electric charges on the surface of an object is called ____electricity.
current
power
static
none of the above
Sometimes when objects rub against each other, _____charges move from one object to the other.
positive
negative
all
none of the above
A material that allows electric charge to flow through it easily. Metal can be a good ______.
conductor
insulator
charge
To pull toward means ____.
attract
repel
An invisible pulling or pushing force that exists around a magnet is called _____.
magnetism
electricity
A place on a magnet where its magnetism is strongest is called ____.
the center
the magnetic pole
Matter that is neutral has ___ ___ ____ ____ ___.
the same number of positive and negative charges
has more positive than negative charges
_____ magnets do not lose their magnetism.
Permanent
Temporary
The strength of a magnetic force depends on ___.
the distance between objects
the position of the magnets
the properties of the objects
all of the above
This picture shows that forces _____.
attract
repel
This top part of this picture shows forces that ____.
attract
repel
Charges that are the same _____each other.
repel
attract
Charges that are opposite ____ each other.
repel
attract
If you place a balloon with negative charges near a wall with positive charges, what happens? Why?
The balloon sticks to the wall because the negative charges on the balloon are attracted to the positive charges on the wall.
The balloon sticks because the charges are repelling each other.
If you have a balloon with negative charges and you bring it near another balloon with negative charges, what happens? Why?
The balloons push away from each other because their like negative charges repel each other.
The balloons attract to each other.
Can an electric force act on two charged objects if they do not touch? Why?
Yes. Electric forces act at a distance.
No.
Where is an electric force the strongest?
close to the charged object
none of the above
