Solar Energy Concepts and Applications

Ryan Alam presents on solar energy, emphasizing its role as a clean, renewable energy source. He discusses the impact of climate change and the importance of reducing carbon emissions through renewable energy. The presentation covers the basics of solar energy, including its conversion into thermal and electrical energy, and the working of photovoltaic cells. Alam explains the differences between on-grid and off-grid solar systems and concludes with the advantages and disadvantages of solar energy.

What is one of the main causes of climate change mentioned in the presentation?

• Urbanization

• Overfishing

• Carbon emissions

• Deforestation

Which country hosted the 26th Climate Change Conference of Parties?

• United States

• United Kingdom

• India

• Australia

What percentage of greenhouse gases is produced by electric power stations?

• 16%

• 12%

• 26%

• 33%

What is the primary element used in photovoltaic cells?

• Copper

• Iron

• Silicon

• Carbon

What is the process called that converts sunlight into electricity in solar cells?

• Nuclear fusion

• Electrolysis

• Photovoltaic effect

• Thermal conversion

What happens to electrons in a solar cell when sunlight hits it?

• They remain static

• They disappear

• They jump across the barrier

• They move to the lower layer

What is a key advantage of solar energy?

• Pollution-free

• Requires a lot of space

• High initial cost

• Limited applications

Which type of solar power system allows energy storage for use at night?

• Off-grid

• Direct

• On-grid

• Hybrid

What is a disadvantage of solar energy mentioned in the presentation?

• No solar power at night

• High maintenance cost

• Unlimited energy supply

• Low initial cost

What is a diverse application of solar energy?

• Generating electricity

• Logging

• Mining

• Fishing