gs1medium

With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:

  1. 1.RTGs are miniature fission reactors.
  2. 2.RTGs are used for powering the onboard systems of spacecraft.
  3. 3.RTGs can use Plutonium-238, which is a by-product of weapons development.

Which of the statements given above are correct?

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
▶ Answer & Explanation

Correct answer: B. 2 and 3 only

Radioisotope thermoelectric generators (RTGs) operate by converting heat released from the radioactive decay of a material, such as Plutonium-238, into electricity using thermocouples. They are not nuclear fission reactors; rather, they rely on spontaneous radioactive decay. Their long operational life and reliability make them ideal for deep space missions and remote terrestrial applications where solar power is insufficient or impractical, such as powering spacecraft systems.

Source: UPSC gs1 2024

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