Magnets
Most magnets have two areas at which the magnetic field is the strongest. What do we call these areas?
Poles
Atoms are made of protons, neutrons, and electrons. Which of these three particles move in order to create electrical fields?
Electrons
What shape does a circuit have to form?
Circle
Electric currents are capable of creating what type of field around them?
Magnetic Field
What does it mean to be electrically neutral?
Have the same number of positive and negative charges.
If you move the North end of a magnet close to the North end of another magnet, what will happen?
They will repel each other.
One can create an electrical field by rubbing a balloon against someone's hair. What is happening to the electrons in this situation?
Electrons are transferred from the hair to the balloon, making them oppositely charged and attracted to one another.
What is the difference between an open circuit and a closed circuit?
Open circuit is not connected all the way around and a closed is.
In class, we made a device using a nail with wire wrapped around it and it was attached to a battery. What was this device called?
An electromagnet.
When you pull your clothes from the dryer right after it turns off, your socks stick to your shirts. Explain why this happens (in more than two words).
Static electricity - the electrons are transferred between the clothes while rubbing against each other in the dryer, creating opposite charges on the clothes making them stick to each other.
Unlike gravity, magnetism does not only attract. It can also do what?
Repel
What rule of thumb can be applied to both magnetic fields and electrical fields?
Opposites Attract and Same Repel
This value stated on the side of the battery can be thought of as the amount of "push" electrons receive from a power source to move through a wire.
Voltage
Name one way that you can increase the strength of an electromagnet.
More coils around the nail
Add more voltage (batteries)
Use tighter coils
How is electrical induction different from electrical conduction?
Induction- transfer of charges without touching
Conduction- transfer of charges by touching
Draw the shape of the magnetic field around a bar magnet.
(Teacher's Discretion)
Electric current is the movement of electrons through a conductor. What unit do we use to measure electric current?
Amps (Amperes)
Electric motors turn electrical energy into what type of energy?
Mechanical/Kinetic Energy
Direct current is used mostly in battery powered devices. Where do we use alternating current?
Power grids
Magnets interact with other magnets and objects made of certain types of metal such as iron. Why do magnets interact with iron but not plastic? (What is special about the molecular makeup of iron?)
Iron has magnetic domains that allow it to be attracted to magnets.
What is the difference between an electrical conductor and an electrical insulator? Give an example of each.
Insulator- does not allow electricity to pass through
Draw a picture of parallel circuit and a series circuit.
(Teacher's Discretion)
Electric Generators do the opposite of electric motors. They turn _________ energy into ________ energy.
Mechanical/Kinetic
Electrical
What type of current is used by electrical generators?
Alternating Current