Solar Panels

How much solar power does the Earth intercept?

• 10 million terawatts

• 173 million terawatts

• 10 thousand terawatts

• 173 thousand terawatts

What is the most common material used in solar cells?

• Graphene

• Silicon

• Plastic

• Copper

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NGSS.HS-PS3-3

What creates the electric field in a silicon solar cell?

• The conductive layers

• The crystalline silicon

• The p/n junction

• The metal fingers

What happens when a photon strikes the silicon cell?

• It generates heat

• It creates a magnetic field

• It reflects back into space

• It knocks an electron from its bond

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NGSS.HS-PS4-3

What is the role of the electric field at the p/n junction?

• To reflect photons

• To create a magnetic field

• To generate heat

• To direct the flow of electrons and holes

How much voltage does each silicon cell produce?

• 12 volts

• 5 volts

• 0.5 volts

• 1 volt

What is a major physical challenge to relying completely on solar power?

• Solar energy is unevenly distributed across the planet

• The size of solar cells

• The color of solar cells

• The weight of solar panels

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NGSS.MS-ESS3-1

What is the efficiency range of most commercial solar systems?

• 30-35%

• 15-20%

• 5-10%

• 46-50%

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NGSS.HS-ESS3-2

NGSS.HS-ETS1-3

NGSS.HS-PS3-3

What would be required for the world to be completely reliant on solar energy?

• Decreasing the world's energy consumption

• Only using solar energy at night

• Funding to build infrastructure and space

• Banning all other forms of energy

Tags

NGSS.HS-ETS1-1

NGSS.HS-ETS1-2

Why is solar energy already cheaper and safer in some developing countries?

• Because of government subsidies

• Because of the lack of alternatives like kerosene

• Because of the abundance of sunlight

• Because of lower labor costs

Tags

NGSS.HS-ETS1-3