With reference to technology for solar power production, consider the following statements: 1. Photovoltaics is a technology that generates electricity by direct conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilises the Sun’s rays to generate heat which is further used in the electricity generation process. 2. Photovoltaics-generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC). 3. India has a manufacturing base for Solar Thermal technology, but not for photovoltaics. Science and Technology 577 Which of the statements given above is/are correct?

Question

YESPYQ · Accepted Answer

Correct answer: 1 only. Statement 1 is correct: PV technology directly converts sunlight into electricity using semiconductor materials like silicon. When sunlight hits the PV cells, it excites electrons, generating Direct Current (DC) electricity. This is a clean and efficient method of harnessing solar energy for electricity. Solar thermal systems use solar collectors to capture the Sun’s heat. This heat is typically used to produce steam, which drives turbines connected to generators, producing electricity. Solar thermal is often used in large-scale power plants and heating systems. Statement 2 is incorrect: PV systems initially produce Direct Current (DC), which is then converted to Alternating Current (AC) using inverters for compatibility with the electrical grid and household appliances. Solar Thermal systems generate heat, which is used to produce AC electricity through conventional turbines and generators. Statement 3 is incorrect: India has established manufacturing capabilities for both Solar Thermal and Photovoltaic technologies. The country is expanding its PV manufactur

Practice more Science PYQs

More UPSC Science PYQs