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Thermal Properties of Matter Test - 68

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Thermal Properties of Matter Test - 68
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  • Question 1
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    The wavelength of radiation emitted by a body depends upon
    Solution

  • Question 2
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    If black wire of platinum o heated, then its colour first appear red, then yellow and family white. It can be understood on basis of
    Solution

  • Question 3
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    Four pieces of iron heated in a furnace to different temperatures show different colours listed below. Which one has the highest temperature?
  • Question 4
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    The wavelength of maximum energy released during an atomic explosion was 2.93 × 10–10 m. Given that Wien\'s constant is 2.93 × 10–3 m-K, the maximum temperature attained must be of order of
    Solution

  • Question 5
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    The temperature of stars is determined by
  • Question 6
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    On increasing the temperature of a substance gradually, which of the following colours will be noticed by you?
  • Question 7
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    Relation between the colour and temperature of a star is given by
  • Question 8
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    The maximum energy in thermal radiation from a source occurs at the wavelength 4000 Å. The effective temperature of the source is
    Solution

  • Question 9
    4 / -1
    Solar radiation emitted by sun resembles that emitted by a black body at a temperature of 6000 K. Maximum intensity is emitted at a wavelength of about 4800 Å. If the sun were to cool down from 6000 K to 3000 K, then the peak intensity would occur at a wavelength
    Solution

  • Question 10
    4 / -1
    The radiation energy density per unit wavelength at a temperature T has a maximum at a wavelength λ0. At temperature 2T, it will have a maximum at a wavelength
    Solution

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