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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
- For a normal eye, the cornea of eye provides a converging power 40 D and the least
- In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series
- The rms current in an AC circuit is 2 A. If the wattless current be √3 A,
- A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 secs
- If a steel wire of length l and magnetic moment M is bent into a semicircular arc,
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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