Electric Energy

Electric Power & Safety

Forces p. 182-185

Multiple Choice

What is the rate at which energy is transformed from one form to another?

• Power

• Current

• Voltage

Multiple Choice

Power =

• Current x Voltage

• Current x Energy

• Energy x Power

Multiple Choice

How do power companies charge you?

• Based on how much energy you use

• Based on how many watts you use

Multiple Choice

What is calculated by the power of the appliance x by how much time it was used?

• The total amount of energy

• The total amount of power

• The total watts

Multiple Choice

What does kWh stand for?

• kilowatt hours

• kilowatch hours

• kilowatt homes

Multiple Choice

What is another name for the third prong on appliances?

• The ground wire

• The other wire

• The best wire

Multiple Choice

What is the point of the third prong electric devices?

• Connects the metal parts to the building's ground wire

• Connects the appliance to the outlet

• Connects the metal parts to the building's electricity

Multiple Select

What is the point of a fuse? (Select the two best options)

• The fuse will break or melt if it gets

• The fuse will break the circuit

• The fuse is just there for looks

Multiple Choice

What is the point of a circuit breaker?

• The circuit breaker will bend away from the circuit as it heats up

• It will blow and close the circuit

• The circuit breaker gets warm and opens the circuit

Review Questions

Time to see what they have learned!

Multiple Choice

What is the rate at which energy is transformed from one form to another?

• Power

• Current

• Voltage

Multiple Choice

Power =

• Current x Voltage

• Current x Energy

• Energy x Power

Multiple Choice

How do power companies charge you?

• Based on how much energy you use

• Based on how many watts you use

Multiple Choice

What is calculated by the power of the appliance x by how much time it was used?

• The total amount of energy

• The total amount of power

• The total watts

Multiple Choice

What does kWh stand for?

• kilowatt hours

• kilowatch hours

• kilowatt homes

Multiple Choice

What is another name for the third prong on appliances?

• The ground wire

• The other wire

• The best wire

Multiple Choice

What is the point of the third prong electric devices?

• Connects the metal parts to the building's ground wire

• Connects the appliance to the outlet

• Connects the metal parts to the building's electricity

Multiple Select

What is the point of a fuse? (Select the two best options)

• The fuse will break or melt if it gets

• The fuse will break the circuit

• The fuse is just there for looks

Multiple Choice

What is the point of a circuit breaker?

• The circuit breaker will bend away from the circuit as it heats up

• It will blow and close the circuit

• The circuit breaker gets warm and opens the circuit