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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: - The alternating current in a circuit is given by I=50 sin314t. The peak value
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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
- The alternating current in a circuit is given by I=50 sin314t. The peak value
- A spherical drop of capacitance 1μF is broken into eight drops of equal radius.
- A compass needle which is allowed to move in a horizontal plane
- A circular disc X of radius R is made from an iron plate of thickness t and another disc
- Two waves are represented by the equations y₁ = a sin (?t + kx + 0.57) m
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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