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

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

This circuit won't work. What essential part is missing from this circuit?

• resistance
• source of electric current
• conductor
• ammeter

What is a switch's function in a circuit?

• to make the current hotter or colder
• turn on and off the flow of current
• the pathway that current flows
• to add more power to the circuit

Which one is a conductor? 

• wood 
• iron 
• plastic spoon 
• paper 

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 the electric circuit is OPEN, the switch is ____.

• ON
• OFF

The picture shows an electrical circuit. This circuit is a series circuit because: 

• It has 3 light bulbs.
• The same current flows through all three light bulbs.
• It uses a single battery.
• The electrical current is divided between the three light bulbs.

Which of these best completes the circuit?

• rubber band
• metal nail
• leather shoelace
• wooden toothpick

This instrument can be used to see if materials conduct electricity.  Which of these groups contains items that could all conduct electricity to complete the circuit?

• rubber ball, plastic comb, nail
• paper clip, penny, screw
• cork, dollar bill, tweezers
• pencil, eraser, spoon