## Wein's Displacement Law - MCQ - Basic Level

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of Basic Level Questions on Wein's Displacement Law. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A black body has maximum wavelength Î»m at temperature 2000 K. Its corresponding wavelength at temperature 3000 K will be

•  3/2 Î»m
•  2/3 Î»m
•  4/9 Î»m
•  9/4 Î»m

Q2. The wavelength of radiation emitted by a body depends upon

•  The nature of its surface
•  The area of its surface
•  The temperature of its surface
•  All the above factors

Q3. On investigation of light from three different stars A, B and C, it was found that in the spectrum of A the intensity of red colour is maximum, in B the intensity of blue colour is maximum and in C the intensity of yellow colour is maximum. From these observations it can be concluded that

•  The temperature of A is maximum, B is minimum and C is intermediate
•  The temperature of A is maximum, C is minimum and B is intermediate
•  The temperature of B is maximum, A is minimum and C is intermediate
•  The temperature of C is maximum, B is minimum and A is intermediate

Q4. If black wire of platinum is heated, then its colour first appear red, then yellow and finally white. It can be understood on the basis of

•  Wien's displacement law
•  Prevost theory of heat exchange
•  Newton's law of cooling
•  None of the above

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