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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: - If a magnetic substance is brought near the north or the south pole of a bar magnet
- A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
- An inductor is connected to an a.c. source when compared to voltage,
- There are four light-weight-rod samples A,B,C,D seperately suspended by threads
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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
- If a magnetic substance is brought near the north or the south pole of a bar magnet
- A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
- An inductor is connected to an a.c. source when compared to voltage,
- There are four light-weight-rod samples A,B,C,D seperately suspended by threads
- Two particles P and Q start from origin and execute simple harmonic motion along X-axis
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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