Current and Static Electricity

What happens when you touch a metal doorknob after rubbing your shoes on the carpet?

• The doorknob sends a burst of electric current into your body

• Millions of electrons go from your finger into the doorknob

• The doorknob sends millions of electrons into your finger

• Your finger becomes negatively charged

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If you rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.

• The balloons will attract each other.

• The balloons will become positively (+) charged.

• The balloons will pop.

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Electrical charge built up on the surface of an object is called _________________ .

• static electricity

• current electricity

• lightning

• electrons

Lightning occurs because ___.

• the negative charges at the bottom of clouds are attracted to the positive charges on the ground.

• the positive charges at the bottom of clouds are attracted to the negative charges on the ground.

• the positive and negative charges inside clouds are attracted to each other

• All of these reasons are correct.

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In the circuit, if you replace the paper clip with a plastic spoon, what would happen?

• The bulb wouldn't light

• The bulb is dimmer

• The bulb is brighter

• There is no change

A series circuit has ____ path(s) that the electric current can take. 

• One

• Two 

• Three 

• Four

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.

• The same current flows through all three light bulbs.

• It uses a single battery.

• The electrical current is divided between the three light bulbs.

What is the primary difference between static electricity and current electricity?

• Static electricity is the flow of electric charge, while current electricity is stationary.

• Static electricity is stationary, while current electricity is the flow of electric charge.

• Both are the same and involve the flow of electric charge.

• Static electricity involves magnetic fields, while current electricity does not.

Which of the following materials is a good conductor of electricity?

• Rubber

• Glass

• Copper

• Wood

What happens to the resistance in a wire as it gets longer?

• Resistance decreases

• Resistance increases

• Resistance stays the same

• Resistance becomes zero