Circuits

What are the three important parts of a simple circuit?

• A source of heat, a path for the heat to move through, and a resistor
• A source of water, a path for the water to flow through, and a resistor
• A source of electricity, a path for the electricity to flow through, and a resistor
• A source of light, a path for the light to travel on, and a resistor

Which of the following devices can act as resistors in a circuit?

• Refrigerators
• Light bulbs
• Washing machines
• Microwaves

When does a short circuit occur?

• When the battery is fully charged
• When the circuit is turned off
• When there is not enough resistance in the circuit
• When there is too much resistance in the circuit

What does a resistor do in a circuit?

• Creates a short circuit
• Transforms electricity into light and heat energy
• Stops the flow of electricity
• Increases the flow of electricity

What happens when a light bulb is added to a circuit?

• It creates a short circuit
• It transforms some of the electricity into light and heat energy
• It increases the flow of electricity
• It stops the flow of electricity

Which devices use simple circuits to transform electrical energy into heat and motion?

• Computers
• Electric heaters and motors
• Refrigerators
• Televisions

How is a circuit described in terms of electron flow?

• A triangle
• A circle
• A straight line
• A square

What does electricity do in a simple circuit?

• It flows through the circuit and does work
• It creates a short circuit
• It disappears
• It stops flowing

How do electric circuits allow electricity to move around?

• By producing light
• By creating obstacles
• By forming loops
• By generating heat

What is the practical application of understanding how circuits work?

• To build a house
• To use electricity in different ways
• To bake cookies
• To create art