A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the…
Physics · JEE Advanced · NTA Exams — Thermodynamics
A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius is halved and the temperature is doubled, the power radiated in watt would be
- 225
- 450
- 900
- 1800.
Answer
(D) 1800.
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the…
- If a black body radiates 10 cal/s at 227°C, it will radiate at 727°C :
- Three rods of same dimensions have thermal conductivities 3k, 2k and k. They are arranged as shown, with…
- If two rods of length L and 2L, having coefficient of linear expansion α and 2α respectively are connected…
- Equal temperature differences exist between the ends of two metallic rods 1 and 2 of equal lengths. Their…
- A human body has a surface area of approximately 1 m 2 . The normal body temperature is 10 K above the…
- The rate of flow of heat depends on the nature of material, cross-sectional area and temperature gradient. If…
- An aluminium sphere of 20 cm diameter is heated from 0°C to 100°C. Its volume changes by (given that…
More Thermodynamics questions · Browse all practice questions