Electrical Energy

What type of energy moves through the wires of a closed circuit?

• sound
• chemical
• electrical
• physical

Which of these uses electric currents to move energy from place to place?

• a book
• a blender
• a match
• the sun

An example of electrical energy being transformed into sound energy is...

• turning on a t.v.
• turning off a lamp
• reading a book
• writing on a piece of paper

How is energy transformed when guitar music comes out of an amplifier?

• Thermal energy is changed to energy of motion
• Sound energy is changed to stored energy
• Electrical energy is changed to sound energy
• Light energy is changed to stores energy

What happens to the electrical energy that powers a space heater when it is turned on?

• All of it is destroyed.
• All of it changes to energy of motion.
• Some of it changes to thermal energy.
• Some of it changes to stored energy.

Which object's purpose is to change electrical energy into thermal energy?

• An electric fan
• A water turbine
• A radio
• A microwave

Which object's purpose is to change electrical energy into light energy?

• A heater
• A lamp
• A toaster
• A vacuum cleaner

Why does a phone charger feel warm when it has been plugged into the wall for awhile?

• Some of the electrical energy was changed to chemical energy.
• Some of the electrical energy was changed to stored energy.
• Some of the electrical energy was changed to light energy.
• Some of the electrical energy was changed to thermal energy.

Sam's computer screen was black. He moved the mouse and his computer screen picture showed up. How was electrical energy powering his computer changed when he did this?

• It became sound energy.
• It became light energy.
• It became thermal energy.
• It became stored energy.

How do wind and water turbines work?

• They transform electrical energy into energy of motion.
• They transform energy of motion into electrical energy.
• They transform sound energy into electrical energy.
• They transform thermal energy into electrical energy.