Solar Energy Quiz

How much solar power does the Earth intercept?

• 173 million terawatts

• 173 billion terawatts

• 173 gigawatts

• 173 thousand terawatts

What is the most common material used in solar cells?

• Silicon

• Copper

• Aluminum

• Iron

What type of silicon has extra electrons?

• n-type silicon

• d-type silicon

• p-type silicon

• q-type silicon

What are the tiny particles of light called?

• Electrons

• Photons

• Protons

• Neutrons

What happens when a photon strikes the silicon cell with enough energy?

• It reflects off the silicon

• It heats up the silicon

• It knocks an electron from its bond

• It creates a hole in the silicon

What collects the mobile electrons in a solar cell?

• Silicon layers

• Photons

• Thin metal fingers

• Conductive aluminum sheet

How much voltage does each silicon cell produce?

• One and a half volts

• Two volts

• Half a volt

• One volt

What is a major physical challenge of relying completely on solar energy?

• Complex installation process

• Lack of sunlight

• Uneven distribution of solar energy

• High cost of solar panels

What is the efficiency range of most commercial solar systems?

• 10-15%

• 5-10%

• 15-20%

• 20-25%

What is the highest efficiency achieved by a solar cell so far?

• 36%

• 66%

• 46%

• 56%