| ⇦ | 
| ⇨ |
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: - A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
- 34 gram of water at 30⁰C is poured into a calorimeter at 15⁰C.
- Two capacitors 3μF and 4μF, are individually charged across a 6 V battery.
- In stretching a spring by 2 cm, energy stored is given by U. Had is been stretched
- When a mass M is attached to a spring of force constant K,
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
- 34 gram of water at 30⁰C is poured into a calorimeter at 15⁰C.
- Two capacitors 3μF and 4μF, are individually charged across a 6 V battery.
- In stretching a spring by 2 cm, energy stored is given by U. Had is been stretched
- When a mass M is attached to a spring of force constant K,
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply