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WorksheetsElectric and Magnetic Forces
Total questions: 25
Worksheet time: 25mins
A temporary magnet with a magnetic field produced by electric current.
electromagnetic
magnetic strength
electric charge
shock
To force something to move away or apart.
repel
attract
charge
pull
What tells us how strong a magnet is?
magnetic strength
charged particle
magnetic field
current
This results from an interaction between electrically charged particles.
charged particle
repel
electromagnetic force
What type of force is holding this balloon to the wall?
Applied
Gravitational
Magnetic
Electrical
An area where magnetic materials are attracted or repelled by the magnet.
corn field
magnetic field
electromagnetic
A form of energy available through a conductor
electromagnetic
magnetic charge
electric charge
A particle with either a positive or negative charge
magnetic strength
charged particle
attraction
matter with a surplus or deficiency of electrons
electric charge
charged object
electromagnetic
The flow of electric charge through an object
electromagnetic force
shocking
current
In an electromagnet, coils of wire are wrapped around a magnetic object to generate a magnetic field. What the is relationship between number of coils and the strength of the magnetic field?
The more coils an electromagntic has, the stronger the magnetic field
The more coils an electromagntic has, the weaker the magnetic field
The larger the metal object, the stronger the magnetic field is
There is no relationship between number of coils and the strength of a magnetic field
Which of the two below result in an attractive force?
A positive charge and a negative charge
Two negative charges
Two south poles
A north pole and a south pole
Two postive charges
Static electricity is the buildup of charges between two objects. What best explains why a balloon is attracted to hair when the two have been rubbed together?
The balloon and hair both have positive charges
The balloon and the hair both have negative charges
The balloon and the hair both have neutral charges
The balloon and the hair both have opposite charges
Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?
The poles facing one another are both south poles
The poles facing one another are both north poles
The poles facing one another are opposite poles
One magnet was bigger than the other
Frederick sets paper clips out on a table. He then takes a magnet, places it directly beneath the paper clips under the table, and moves the magnet. He finds that the paper clips move with the magnet. Why does this happen?
Magnetic force is a repellant force
Magnetic forces act on wood, like in the table
The paper clips are feeling the gravitational force of the magnet
Magnetic forces act at a distance, even betwewn objects
To decrease the strength of a magnetic field around an electromagnet, we must
increase the number of coils
increase the size of the iron core
decrease the size of the iron core
decrease the number of coils
A Van der Graff generator works by
Causing the outside of the metal ball to become positively charged
Causing the outside of the metal ball to become neutrally charged
Causing the outside of the metal ball to become a bar magnet
Causing the outside of the metal ball to become negatively charged
Surrounding each magnetic is an invisible force field called
Gravity
A magnetic field
An electric field
The Force
What is the cause of electricity?
Magnetism
Gravity
Moving electrons
Lightning
What makes an electromagnet stronger?
Greater number of loops
Smaller number of loops
Decreasing the current
Atoms That have a positive charge will be attracted to atoms with a _______ charge.
Positive
Negative
Neutral
What happens to the force between two charged objects as the distance between them increases?
A) The force increases
B) The force decreases
C) The force remains the same
D) The force becomes zero
Which of the following materials is most likely to be used as a core in an electromagnet to enhance its magnetic field?
A) Plastic
B) Wood
C) Iron
D) Glass
In a simple electric motor, what role does the commutator play?
A) It generates electrical energy
B) It reverses the direction of current
C) It increases the voltage
D) It decreases the resistance
Which of the following best describes the relationship between electricity and magnetism?
A) They are completely unrelated phenomena
B) Electricity can create magnetism, but magnetism cannot create electricity
C) Magnetism can create electricity, but electricity cannot create magnetism
D) Electricity and magnetism are interrelated and can influence each other
