Circuits

A fifth grade class constructed this circuit.  Which of these objects most likely made the light glow when connected to points X and Y?

• plastic straw
• cotton string
• aluminum foil
• rubber eraser

The electrician in this picture is wearing rubber gloves for protection.  The purpose of the rubber gloves is to --

• keep the electrician dry
• create an electrical circuit
• produce electricity
• protect the electrician

Which of these substances conducts electricity the best?

• wood
• brick
• copper
• plastic

Will the light bulb in this circuit light and why/why not?

• yes, because it has two batteries
• no, because the switch is open
• yes, because it is in a circuit
• no, because the bulb is burned out

If bulb 1 burns out, what will occur?

• bulbs 2 and 3 will go out
• bulbs 2 and 3 receive more volts
• bulbs 2 and 3 will stay lit
• nothing will happen

A student builds a circuit made up of a battery, two light bulbs, and a switch. What will the student most likely observe in this circuit?

• Light bulb 1 and light bulb 2 will both be on

• Light bulb 1 will be off, but light bulb 2 will be on

• Light bulb 1 and light bulb 2 will both be off

• Light bulb 1 will be on, but light bulb 2 will be off

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut a the point shown by the arrow?

• 0

• 1

• 2

• 3

Why won’t the light bulb in the circuit pictured to the right light up?

• The wires from the second light bulb are not connected to the battery
• The wires are not connected between the light bulbs 
• The wires are not connected to both sides of the first light bulb
• The wires are too long to complete the circuit 

What kind of circuit is this?

• series
• parallel

What is a Parallel circuit? 

• Has only one path 
• Has more than one path 
• Allows energy to travel through easily 
• Has only one light bulb