Intro To Electric Circuits, Part 1

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Question 1: Are all electric circuits powered by batteries?

• No

• Yes

Answer explanation

No. Examples of other electrical power sources are solar panels and wall outlets.

Can an electric circuit have more than one thing that uses electricity?

• No

• Yes

Answer explanation

Yes. We showed a computer’s circuit board with many things on it that use electricity.

Is a good electrical insulator something that conducts electricity well?

• No

• Yes

Answer explanation

No. A good electrical insulator (like rubber or plastic) conducts electricity poorly.

In general, are metal wires good electrical conductors?

• No

• Yes

Answer explanation

Yes. That's why these are on the inside of electrical cables.

Can wires get hot or bright when electricity flows through them?

• No

• Yes

Answer explanation

Yes. We can see this in space heaters, stove tops and lightbulbs.

If a switch is closed, does that mean electricity can flow in the circuit?

• No

• Yes

Answer explanation

Yes. This is like a drawbridge that is down, and lets traffic across.

In the example we showed, if the switch is open will the lightbulb go on?

• No

• Yes

Answer explanation

No. Like a drawbridge that is up and stops traffic, an open switch stops electrical flow.

Do all electric circuits have switches?

• No

• Yes

Answer explanation

No. Examples we gave are hot glue dispenser and cell phone chargers