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12th Standard English Medium Physics Subject Atomic and Nuclear physics Book Back 5 Mark Questions with Solution Part - I Question Bank Software Jun-01 , 2021

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12th Standard English Medium Physics Subject Atomic and Nuclear physics Book Back 5 Mark Questions with Solution Part - I

12th Standard English Medium Physics Subject Atomic and Nuclear physics Book Back 5 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Physics

Time : 01:00:00 Hrs
Total Marks : 25

    Part I

    5 x 5 = 25

  1. Calculate the radius of the earth if the density of the earth is equal to the density of the nucleus.[mass of earth 5.97 x 1024 kg].

  2. Half lives of two radioactive elements A and B are 20 minutes and 40 minutes respectively. Initially, the samples have equal number of nuclei. Calculate the ratio of decayed numbers of A and B nuclei after 80 minutes.

  3. Calculate the time required for 60% of a sample of radon undergo decay. Given T1/2 of radon = 3.8 days.

  4. Show that the mass of radium \((_{ 88 }^{ 226 }{ Ra })\) with an activity of 1 curie is almost a gram. Given T1/2 = 1600 years.

  5. Compute the binding energy of  \(_{ 2 }^{ 4 }{ He }\) nucleus using the following data: Atomic mass of Helium atom MA(He) = 4.00260u and that of hydrogen atom, mH = 1.00785u.

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