Electric Circuits & Current Electricity

In order for electricity to be useful, we need...

• A steady flow electricity.

• An overflow of protons.

• A light bulb that never runs out.

What is the function of a power source in circuit?

• To cause motion of protons.

• To generate a steady supply of electrons.

• To deflect any static electricity.

Insulators are a material that electrons have a hard time flowing through

• True

• False

What is a LOAD in a circuit?

• A device that uses magnetism.

• A device that uses electricity.

• A device that uses solar energy.

How does a SWITCH work?

• The switch increases the amount of electrons flowing in the wires.

• The switch makes the electrons in a wire move faster.

• The switch opens or closes the circuit.

For electric current to flow, do you need a closed or open circuit?

• Closed.

• Open.

What do fuel cells, batteries, and solar cells have in common?

• a. They all produce static electricity

• b. They are all sources of direct current

• c. They are all sources of alternating current

• d. They can all be used to power automobiles

How does alternating current differ from direct current?

• a. Alternating current produces more voltage than direct current

• b. Alternating current always flows in the same direction; the direction of a direct current switches back and forth

• c. Direct current produces more voltage than alternating current

• d. Direct current always flows in the same direction; the direction of an alternating current switches back and forth

What is the function of every generator on Earth?

• a. Changing wind energy into electrical energy

• b. Changing heat energy into electrical energy

• c. Changing mechanical energy into electrical energy

• d. Changing solar energy into electrical energy

Place the following events in sequence: A) Voltage is increased by a transformer; B) Voltage is decreased by a transformer; C) Electrical current enters your home

• a. A, B, C

• b. B, A, C

• c. A, C, B

• d. B, C, A