With reference to technologies for solar power production, consider the following statements:

  1. ‘Photovoltaics’ is a technology that generates electricity by direction conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilizes the Sun’s rays to generate heat which is further used in electricity generation process.
  2. Photovoltaics generate Alternating Current (AC), while solar Thermal generates Direct Current (DC).
  3. India has manufacturing base for Solar Thermal technology, but not for Photovoltaics.

Which of the statement(s) given above is/are correct?

[UPSC Civil Services Exam – 2014 Prelims]

(a) 1 only

(b) 2 and 3 only

(c) 1, 2 and 3

(d) None


Answer: (a)        

Explanation:

  • PV devices, consisting of semiconductors, can generate electricity directly from sunlight by converting the incoming radiation. This makes them a reliable source of electricity. Meanwhile, solar thermal systems can also capture radiant energy from the sun and convert it into high-temperature thermal energy, which can be directly utilized or transformed into electricity. Hence, Statement 1 is correct.
  • Solar energy can be converted directly into electrical energy (direct current, DC) by photovoltaic (PV) cells commonly called solar cells. Hence Statement 2 is Not Correct.
  • India has a manufacturing base for Solar Thermal technology as well as for Photovoltaics. Hence Statement 3 is Not Correct.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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