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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
- The half life of radioactive isotope ‘X’ is 50 years. It decays to
- A coil has an area of 0.05 m² and it has 800 turns. It is placed perpendicularly
- In potentiometer experiment, a cell of emf 1.25V gives balancing length of 30 cm
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor.
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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