Closed Circuits

Why 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

Tags

NGSS.MS-PS2-3

Which of the following materials is an electrical conductor?

• Plastic spoon

• Silver-colored plastic spoon

• copper spoon

• wooden spoon

A material that does NOT let electricity pass through it is called ...

• An electrical conductor

• An electrical insulator

• An electrical source

• An electric appliance

What is a circuit with several paths for electricity to flow?

• conductor

• series circuit

• parallel circuit

• open circuit

What is a circuit that only has ONE path for electricity to flow?

• series circuit

• closed circuit

• parallel circuit

• light bulb

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery
• the buzzer is made of special plastic
• the wires are cooled by the surrounding air
• electricity can flow in a complete path

Tags

NGSS.MS-PS3-5

Which of the following can work as an energy source?

• Battery
  
• Light bulb
• Wire
  
• All of them

Tags

NGSS.4-PS3-2

NGSS.4-PS3-4

Which bulbs will light?

• 1 and 2
• 2 and 3
• 3 and 4
• 4 and 2