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Nuclei Test - 2...

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  • Question 1
    1 / -0

    The intensity of gamma radiantion from a given source is I . On passing through 36 mm of lead , it is reduced to I/8 . The thickness of lead which will reduce the intensity to I/2 will be

  • Question 2
    1 / -0

    A freshly prepared radioactive sample of halflife 1 hour emits radiations that are 128 times as intense as the permissible safe limit . The minimum time after which this sample can be safely used is

  • Question 3
    1 / -0

    Which of the following is wrongly matched ?

  • Question 4
    1 / -0

    It is possible to understand nuclear fission on the basis of the

  • Question 5
    1 / -0

    Half - lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes . Initially the samples of A and B have equal number of nuclei . After 80 minutes the ratio of remaining numbers of A and B nuclei is

  • Question 6
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    An alpha particle has

  • Question 7
    1 / -0

    The half life of radium is about 1600 years. Of 100 g of radium existing now , 25 kg will remain unchanged after

  • Question 8
    1 / -0

     Nucleus of an atom of mass no . 24 and charge no. 11 consists of

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