Electricity and Magnetism

What is static electricity?

• a buildup of electric charge on something

• a repelling between electrons

• an electric circuit

• a flow of protons

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If a copper wire is attached to the positive and negative ends of the battery, what will be the effect?

• an electrostatic discharge

• an electric current

• a power source

• static electricity

The illustration shows an electric circuit consisting of a battery and three light bulbs.   

What type of circuit is shown in the diagram?

• series circuit

• parallel circuit

• double circuit

• open circuit

The picture shows a device made of a battery, a nail, and a long piece of copper wire.  It converts electrical energy into a different form of energy.   

Which term describes the device in the illustration?

• electric generator

• electric motor

• electromagnet

• electric switch

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Hector rubs a comb with a wool cloth.  Next, he holds the comb near, but not touching, some bits of paper. 

Which of the following is most likely to happen?

• A spark jumps between the paper bits and the comb.

• The paper bits move away from the comb.

• The paper bits are not attracted to the comb.

• The paper bits are attracted to the comb and stick to it.

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This diagram shows the particles that make up an atom.  

What is the charge of the atom shown?

• static

• positive 

• neutral

• negative

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An electron is the particle most easily removed from an atom.  Suppose this atom lost an electron.  

What electric charge would the atom then have?

• static

• positive

• neutral

• negative

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What happens when an object with a negative charge comes near another object with a negative charge?  

• The objects neither repel nor attract each other.

• The objects both gain electric charges.

• The two objects attract each other.

• The objects repel each other.

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Curtis uses a wool cloth to give a balloon a negative charge.  What will happen if he holds the balloon near the wall, and why?  

• The balloon will not stick to the wall because the negatively charged balloon is repelled by the negatively charged wall.

• The balloon will stick to the wall because a negatively charged object is attracted to the negatively charged wall.

• The balloon will stick to the wall beacuse the negatively charged balloon is attracted to the uncharged wall. (It pushes the negatives away and is attracted to the positives)

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What happens when the north and south poles of different magnets get close to each other?  

• nothing

• They repel each other.

• They attract each other.

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