How do solar panels work?

What is the most common material used to make solar cells?

• Aluminum

• Silicon

• Copper

• Gold

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

• It creates a magnetic field around the cell

• It knocks an electron from its bond, leaving a hole

• It creates a negative charge on one side

• It creates a positive charge on one side

What is the efficiency of the most efficient solar cell in converting sunlight to electricity?

• 30%

• 60%

• 46%

• 75%

What is the main challenge in achieving total reliance on solar power?

• Political factors

• Logistical challenges

• Uneven distribution of solar energy

• All of the above

What is the main advantage of solar energy in developing countries?

• It is readily available in all areas

• It is more reliable than the electric grid

• It is more efficient than other energy sources

• It is cheaper and safer than available alternatives

What is the main disadvantage of solar energy in areas like Finland or Seattle?

• It is not reliable

• It is not readily available

• It is not cost-effective

• It is not efficient

What is the lifespan of solar cells?

• 30-40 years

• 5-10 years

• 10-20 years

• 20-30 years

What is the main factor limiting the efficiency of solar cells?

• Dislodged electrons falling back into a hole

• Reflection of sunlight

• All of the above

• Absorption of sunlight

What is the potential area required to power the entire world with solar technology?

• Millions of square miles

• Hundreds of thousands of square miles

• Tens of thousands of square miles

• Thousands of square miles

What is the main reason why over a billion people don't have access to a reliable electric grid?

• Lack of funding

• Lack of space

• Lack of infrastructure

• All of the above