Electric Circuits

Leo built a circuit tester. Which describes objects that complete the circuit?

• Batteries
• Conductors
• Diodes
• Insulators

In the hidden circuit box, you saw that #2 and #5 were connected with a piece of wire. Also, #2 and #7 were connected. If you closed the box and used your circuit tester to touch #5 and #7, the bulb would light. 

• True
• False

Which diagram shows two bulbs in a series?

• 1
• 2
• 3
• 4

In the picture, if you replace the paper clip with a plastic spoon, what is the plastic spoon acting as? 

• A conductor
• A diode
• An insulator
• A switch

One D size battery produces 1.5 volts. How many total votes would 20 D-cell batteries produce?

• 7.5 volts
• 30.0 volts
• 21.5 volts
• 35.5 volts

Which bulbs will light?

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

Where does electricity enter and exit the bulb?

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

Which of these symbols represents a switch? Select the symbol for a switch from the choices provided. 

• A
• B
• C
• D

Look at the drawing. What is the wire?

• A conductor
• A receiver
• An insulator
• An energy source

Which part of the bulb gives off light? 

• 1
• 2
• 3
• 4