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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
- An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
- A body of mass 1.0 kg is falling with an acceleration of 10 ms⁻².
- A bar magnet of magnetic moment M is placed at right angles to a magnetic
- The moment of inertia of a uniform circular disc of radius R and mass M about an axis
- A horizontal straight conductor kept in north-south direction falls under gravity. Then
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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