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A piece of iron is heated in a flame. It first comes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using
Options
(a) Wien’s displacement law
(b) Kirchoff’s law
(c) Newton’s law of cooling
(d) Stefan’s law
Correct Answer:
Wien’s displacement law
Explanation:
Wien’s displacement law, According to this law,
λmax ∞ 1 / T or λmax x T = constant. So, as the temperature increases λ decreases.
Related Questions: - The phase difference between the flux linked with a coil rotating in a uniform
- What is the Q-value of the reaction?
¹H+⁷Li→⁴He+⁴He
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- An ideal black body is equivalent to
- The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The phase difference between the flux linked with a coil rotating in a uniform
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
- A body takes 5 minute for cooling from 50⁰C to 40⁰C. Its temperature
- An ideal black body is equivalent to
- The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
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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