Electricity and Thermal Energy Quiz

How is static electricity generated?

• By moving a wire through a magnetic field

• By the buildup of electric charges due to friction

• By connecting a circuit to a battery

• By heating a metal rod

Which of the following best explains why clothes stick together after coming out of a dryer?

• Heat causes the fabric to fuse together

• Friction removes all charges from the clothes

• Static electricity causes an imbalance of charges

• The fabric absorbs too much moisture

Which of these materials is more likely to become charged when rubbed?

• A copper wire

• A plastic ruler

• A wet sponge

• A steel spoon

What happens when two objects have the same type of charge?

• They attract each other

• They become neutral

• They repel each other

• They release heat energy

What happens when an electric circuit is incomplete?

• The current flows normally

• The voltage increases

• The circuit is open and electricity does not flow

• The resistance becomes zero

Which of the following is necessary for an electric circuit to function?

• A broken wire

• A closed loop

• A high resistance

• A wooden conductor

If a switch in a circuit is open, what will happen to the connected light bulb?

• It will turn on

• It will glow dimly

• It will not light up

• It will overheat

What is the purpose of a power source in an electric circuit?

• To increase resistance

• To supply energy to move charges

• To block the flow of current

• To convert electric energy into heat

Which of the following is an application of the heating effect of electric current?

• A refrigerator cooling food

• A toaster heating bread

• A battery storing charge

• A radio receiving signals

How does an electromagnet differ from a regular magnet?

• It is always magnetized

• It loses magnetism when the current is turned off

• It does not attract iron objects

• It produces heat instead of a magnetic field