Circuits and Electricity

What energy transformation occurs when the doorbell rings?

• electrical energy into light energy

• electrical energy into sound energy

• chemical energy into light energy

• mechanical energy into electrical energy

What other item does Sara need to make a complete circuit.

• a battery

• a switch

• an insulator

• a conductor

Look at this electric circuit diagram that has an electric circuit that has a switch as one of her parts.

What would happen to the light bulb if the switch changes from closed to open?

• It would be duller.

• It would be brighter.

• It would stop glowing.

• It would start glowing.

Tags

NGSS.4-PS3-2

What is the difference between a series circuit and a parallel?

• A series circuit has only one path for current to follow, and a parallel circuit has more than two paths.

• A series circuit uses a battery power source and a parallel circuits uses a wall outlet.

• A series circuit only has current flowing one direction, and a parallel circuit has current flowing in two directions.

• A series circuit only powers one or two things, and a parallel circuits powers many devices.

Which of the following will cause electric charges to no longer flow through a circuit?

• A wire is replaced with a conductor.

• A switch is flipped, causing the circuit to become closed.

• The circuit is changed so that the wires do not make a complete loop.

• The wires are changed so that a series circuit becomes a parallel circuit.

Which are placed in the wrong column?

• air, copper, and glass

• iron, glass, and rubber

• bronze, glass, and iron

• silver, bronze, and glass

Tags

NGSS.MS-PS2-3

Philip needs to choose an item to use to complete a circuit he is making. Which of the following items would be his BEST choice?

• metal coin

• glass bead

• plastic straw

• wooden toothpick

Look at the table that shows a group of objects classified as electrical conductors or insulators. How many objects are not classified correctly?

• 0

• 1

• 2

• 4

Which of these materials is an electrical insulator?

• CD case

• paper clip

• penny

• staple

What energy transformation is happening when you use an electric oven to cook food?

• thermal energy --> light energy

• electrical energy --> thermal energy

• thermal energy --> electrical energy

• electrical energy --> motion energy