When two negatively charged objects come close to each other what will happen?
They will repel each other.
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What is an electric field?
An area that surrounds electrically-charged particles and exerts force on all other charged particles in the the field.
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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
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What does this picture represent?
Electromagnet
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Why isn't the light bulb lit up?
The switch in opened, the flow of energy has been interupted.
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In this circuit what is the source of energy?
The battery
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What would prevent an electric current in a circuit and stop any energy transfer from happening?
opening the switch or disconnecting the wire
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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
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What does this picture show?
Opposites attract
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A material through which electrons can move easily is a _____.
Conductor
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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
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What is a benefit of an electromagnet?
Can be turned on and off, can be made stronger.
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As you get closer to an electric field what happens to the strength?
The electric field gets stronger the closer you get to it.
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As the electric current through a wire increases, what will happen to the magnetic strength?
The magnetic field will get stronger
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Both magnetic fields and electric fields are affected by mass and distance. T/F
True
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Name 3 forces that can cause motion without contact.