Electricity

Why do electricians always wrap wires in plastic?

• Plastic comes in many different colors

• Plastic is a good electrical conductor

• Plastic makes the wires easy to bend

• Plastic is a good electrical insulator

Which of these materials is a good conductor of electricity?

• Rubber

• Metal

• Newspaper

• Glass

Tags

NGSS.MS-PS2-3

The student conducted an experiment with circuits. Why was the bulb bright when he closed the switch?

• The switch produced an electric current

• Closing the switch broke the circuit

• Closing the switch completed the circuit

• The switch did not make a difference

which of the following materials are best used as insulators?

• Wood

• Rubber

• Metal

• Plastic

The student arrived home and turned on a light switch, so she could see how to get to her bedroom. The switch allowed electricity to flow and was transformed into-

• Light energy

• mechanical energy

• superior energy

• radiant energy

____________ allows electricity to flow.

• A conductor
• An insulator
• A magnet

____________ stops the flow of electricity.

• A conductor
• An insulator
• A magnet

To complete a circuit the switch must be

• unattached
• open
• closed

When the switch is closed, the light

• comes on
• stays off
• burns out

In a parallel circuit the current

• makes one circle
• stays in one path
• splits and goes through two components