UPSC CAPF (AC) 2024 Paper I · Question 8

Question 8 of the UPSC CAPF (AC) 2024 Paper I (4 August 2024). Try it first, then open the answer and explanation.

1. CAPF 2024 · P-I · Q8 · General Science · Physics

   Which one of the following heat transfer mechanism does NOT require a medium?

   1. Conduction
   2. Convection
   3. Radiation
   4. Collision

   निम्नलिखित किस ऊष्मा स्थानांतरण क्रिया-विधि में किसी माध्यम की आवश्यकता नहीं होती है?

   1. चालन
   2. संवहन
   3. विकिरण
   4. संघट्टन
   Show answer

   Answer: (3) Radiation

   उत्तर: (3) विकिरण

   Conduction needs particles in contact and convection needs a moving fluid, so both require a material medium. Radiation transfers heat as electromagnetic waves (mainly infrared) that can travel through a vacuum, which is how the Sun's heat reaches the Earth.

Answer it in the practice appMake a topic-wise quiz