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Electric Fields and Circuits
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What happens when you close the switch in a circuit?
Energy will flow
Name 3 forces that can cause motion without contact.
Gravity, Magnetic fields, and Electric fields
Both magnetic fields and electric fields are affected by mass and distance. T/F
True
As the electric current through a wire increases, what will happen to the magnetic strength?
The magnetic field will get stronger
As you get closer to an electric field what happens to the strength?
The electric field gets stronger the closer you get to it.
What is a benefit of an electromagnet?
Can be turned on and off, can be made stronger.
If you bring a positively charged balloon near another balloon and they are attracted to each other what can you claim about the charge on the second balloon?
The second balloon has a negative charge
A material through which electrons can move easily is a _____.
Conductor
What does this picture show?
Opposites attract
If a light bulb is powered by a single D-cell. What happens if two D-cells connected end-to-end are used?
The light bulb will light up brighter
What would prevent an electric current in a circuit and stop any energy transfer from happening?
opening the switch or disconnecting the wire
In this circuit what is the source of energy?
The battery
Why isn't the light bulb lit up?
The switch in opened, the flow of energy has been interupted.
What does this picture represent?
Electromagnet
The opposite poles of a magnet or called the North and South poles. What is used to describe the opposite parts of an electric field?
Positive and negative particles or electrons and protons
What is an electric field?
An area that surrounds electrically-charged particles and exerts force on all other charged particles in the the field.
When two negatively charged objects come close to each other what will happen?
They will repel each other.
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