Electricity: From Nature to Technology

What is the natural form of electricity mentioned?

• Magnetic fields

• Lightning

• Wind energy

• Solar energy

What causes lightning?

• Solar flares

• Electric charges in clouds

• High temperature

• Magnetic fields

What are the two types of electric currents?

• Static and dynamic

• Direct and indirect

• Direct and alternating

• Positive and negative

What is the main difference between direct and alternating current?

• Their source

• Their speed

• The direction of flow

• Their color

Which device is mentioned as not needing recharging?

• Generators

• Fuel cells

• Solar cells

• Batteries

What is the role of solar cells?

• To insulate homes

• To conduct electricity

• To convert sunlight into electricity

• To store electricity

How do fuel cells generate electricity?

• Splitting atoms

• Using sunlight

• Through a chemical reaction

• By heating water

What affects the flow of electricity through wires?

• Color and texture

• Flexibility

• Length and thickness

• Material only

What does a transformer do?

• Generates electricity

• Stores excess electricity

• Converts AC to DC

• Ensures correct power supply to homes

Which power plant uses the earth's heat to generate electricity?

• Geothermal

• Thermal

• Nuclear

• Hydro