Circuit Diagrams

What is the main source of current(power) in a circuit?

• wire

• light bulb

• battery

• insulator

What carries electrical energy to the lightbulb?

• wire

• light bulb

• switch

• battery

What turns the circuit on and off?

• conductor

• insulator

• switch

• light bulb

What changes electrical energy to light energy?

• switch

• light bulb

• battery

• conductor

What appliance converts (changes) ELECTRICAL energy to HEAT energy?

• gas clothes dryer

• calculator

• hair dryer

• cell phone

What's wrong with the circuit?

• The light bulb is burnt out.

• There are not enough connectors.

• There is no energy source.

A phone charger has plastic around the metal wire inside. Why is there plastic surrounding the wire?

• metal wire is an insulator

• plastic is an insulator

• plastic is a conductor

Why will the circuit above not light? *

• The cardboard is an insulator and will not allow the power to flow through to the bulb.

• The snaps are not connected

• The cardboard is a conductor and overpowers the circuit.

Why is electrical wiring usually are covered with a layer of plastic?

• To make it look pretty

• To help electricity flow along the wire

• To make it safe

• To add more energy

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity