Heat & Thermodynamics · JEE Main previous year questions

2002 3 questions

1. Q962002 · 27 Apr 2002 · Shift 1

   Infrared radiation is detected by

   1. A.spectrometer
   2. B.pyrometer
   3. C.nanometer
   4. D.photometer
   Show answer

   Answer: B

2. Q972002 · 27 Apr 2002 · Shift 1

   Which of the following is more close to a black body?

   1. A.black board paint
   2. B.green leaves
   3. C.black holes
   4. D.red roses
   Show answer

   Answer: A

3. Q1442002 · 27 Apr 2002 · Shift 1

   Even Carnot engine cannot give $100\%$ efficiency because we cannot

   1. A.prevent radiation
   2. B.find ideal sources
   3. C.reach absolute zero temperature
   4. D.eliminate friction.
   Show answer

   Answer: C