Understanding Electrical Energy

What is electrical energy?

• Energy from the sun

• Energy from the flow of electrons in an electric circuit

• Energy from chemical reactions

• Energy from nuclear reactions

In what units is electrical energy measured?

• Watts (W)

• Volts (V)

• Joules (J)

• Amperes (A)

Which of the following is NOT a type of energy?

• Thermal energy

• Mechanical energy

• Polar energy

• Nuclear energy

What are the two main sources of electrical energy?

• Solar panels and wind turbines

• Batteries and electric generating stations

• Geothermal plants and hydroelectric dams

• Nuclear reactors and coal plants

How do batteries differ from generating stations?

• Batteries are used for large-scale energy production

• Generating stations store chemical energy

• Batteries are portable and used in small-scale applications

• Generating stations have limited energy storage capacity

What type of energy conversion occurs in an electric cell?

• Mechanical to electrical

• Thermal to electrical

• Chemical to electrical

• Nuclear to electrical

What is an electrolyte?

• A device that stores electrical energy

• A substance that conducts electricity through the movement of ions

• A type of battery

• A form of mechanical energy

How is a battery different from an electric cell?

• A battery is a single electric cell

• A battery consists of multiple electric cells

• A battery does not convert chemical energy

• A battery is non-rechargeable

Which type of electric cell is best for long periods of use in devices like flashlights?

• Secondary cell

• Primary cell

• Fuel cell

• Solar cell

How is a fuel cell more beneficial than a typical electric cell?

• It has a limited energy capacity

• It can continuously produce electricity as long as fuel is supplied

• It is non-rechargeable

• It is used in low-drain applications