All Flashcards
What is the significance of the photovoltaic effect?
It allows direct conversion of sunlight into electricity, making solar energy a viable power source.
Why is solar energy considered a renewable resource?
The sun's energy is virtually inexhaustible on a human timescale.
Explain the role of semiconductors in solar panels.
Semiconductors like silicon enable the flow of electrons when exposed to sunlight, generating electricity.
What are the limitations of solar energy?
Intermittency due to weather and time of day, and high initial costs.
How does solar energy contribute to reducing carbon emissions?
It displaces fossil fuel-based electricity generation, reducing greenhouse gas emissions.
Describe the relationship between solar energy and energy independence.
Solar energy reduces reliance on imported fossil fuels, enhancing energy security.
What is the environmental impact of manufacturing solar panels?
Production requires fossil fuels and can result in some pollution, though less than fossil fuel energy production.
Explain the importance of energy storage for solar energy systems.
Energy storage addresses intermittency by storing excess energy for use when sunlight is unavailable.
How does solar energy impact electricity bills?
Electricity produced from solar panels will decrease electricity bill.
What is the role of trace metals in PV cells?
They act as semiconductors, facilitating the flow of electrons when sunlight strikes the cell.
What are the steps of solar energy conversion in PV cells?
- Sunlight strikes PV cells. 2. Electrons are knocked loose. 3. Electrons flow through a circuit. 4. Electricity is produced.
Describe the process of electricity generation from solar panels.
Photons strike PV cells, electrons are excited, current flows, electricity is produced and used to power homes/businesses.
What are the steps of electricity generation using solar panels?
- Sunlight strikes PV cells. 2. Electrons are knocked loose. 3. Electrons flow through a circuit. 4. Electricity is produced.