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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
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A current of 2A flows through a 2Ω resistor when connected across a battery
- A polished metal plate has a rough and black-spot. It is heated to 1400 K
- A thin circular ring of mass M and radius R rotates about an axis through its centre
- CO₂ laser uses
- A cricketer catches a ball of mass 150 g in 0.1 sec moving with speed 20 m/s
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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