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The temperature of a metal block is increased from 27⁰C to 84⁰C. The rate of radiated energy from the block will increase approximately
Options
(a) 2 times
(b) 4 times
(c) 8 times
(d) 16 times
Correct Answer:
2 times
Explanation:
By Stefan’s law, E₂/E₁ = [(273 + 84)/(273 + 27)]⁴
⇒ E₁/E₁ = (357/300)⁴ = (119/100)⁴
⇒ E₁/E₁ = (1.19)⁴ ≈ 2.
Related Questions: - In a P-N junction
- A body is thrown with a velocity of 9.8 m/s making angle of 30° with the horizontal
- A radioactive sample S₁ having an activity of 5 μCi has twice the number of nuclei
- A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a P-N junction
- A body is thrown with a velocity of 9.8 m/s making angle of 30° with the horizontal
- A radioactive sample S₁ having an activity of 5 μCi has twice the number of nuclei
- A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats
- If emf induced in a coil is 2 V by changing the current in it from 8 A to 6 A
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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