Circuits

What is an electrical circuit?

• lets you turn the energy on and off
• a closed path where where electricity flows
• stop electricity from flowing through

What is a battery?

• switch
• power source
• insulator

A complete circuit has .......

• a motor in it
• a switch in it
• two bulbs in it
• no breaks in it

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

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

Which of the following can work as an energy source?

• Battery
  
• Light bulb
• Wire
  
• All of them

Which bulbs will light?

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

Choose the correct sentence.

• This circuit will work because it is an open circuit.
• This circuit will work because it is a closed circuit.
• This circuit will NOT work because it is an open circuit.
• This circuit will NOT work because it is a closed circuit.

Levi is wanting to light a bulb.  What does he need to get the bulb to light?

• A battery and a paper clip
• A battery and a wire
• A paper clip and a wire
• A switch and a wire

If you replace the paper clip with a plastic spoon, what happens?

• The bulb doesn't light
• The bulb is dimmer
• The wires get hot
• There is no change