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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
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the nucleus ²⁷₁₃Al has nuclear radius of about 3.6 fm
- A nucleus of mass number 220, initially at rest, emits an α-particle. If the Q-value
- If in a L-R series circuit the power factor is 1/2 and R=100Ω, then the value of L is,
- The wave described by y = 0.25 sin (10 2πx – 2πt), where x and y are in meters
- The root mean square speed of oxygen molecule (O₂) at a certain temperature is v.
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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