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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.
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Topics: Properties of Bulk Matter
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The rest mass of a body is m1. It moves with a velocity of 0.6c, then its relativistic
- If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required
- If X=3YZ², find dimensions of Y if X and Z are the dimensions of capacity
- The coefficient of friction between the tyres and the road is 0.25. The maximum speed
- A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth
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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