space medium MCQ

Radioisotope Thermoelectric Generators (RTGs) convert heat from radioactive decay into electricity using which principle?

  1. Photovoltaic effect
  2. Seebeck effect
  3. Thermionic emission
  4. Piezoelectric effect

Answer: Seebeck effect

RTGs use thermocouples exploiting the Seebeck effect to generate electricity from temperature difference between hot Pu-238 fuel and cold space environment.

Topic Space Technology - Power Systems
Exam Relevance SSC CGL, UPSC Prelims
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