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At some instant, a radioactive sample S(...

At some instant, a radioactive sample `S_(1)` having an activity 5 `muCi` has twice the number of nuclei as another sample `S_(2)` which has an activity of 10 `muCi`. The half lives of `S_(1) and S_(2)` are :

A

10 years and 20 years , respectively

B

5 years and 20 years , respectively

C

20 years and 10 years , respectively

D

20 years and 5 years , respectively

Text Solution

Verified by Experts

The correct Answer is:
B
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DISHA PUBLICATION-NUCLEI-EXERCISE - 2 (CONCEPT APPLICATOR)
  1. At some instant, a radioactive sample S(1) having an activity 5 muCi...

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  2. A neutron of energy 1 MeV and mass 1.6 xx 10^(-27) kg passes a proton ...

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  3. The masses of neutron and proton are 1.0087 a.m.u. and 1.0073 a.m.u. r...

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  4. A neutron travelling with a velocity v and kinetic energy E collides p...

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  5. A heavy nuleus having mass number 200 gets disintegrated into two smal...

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  6. The half life of radioactive Radon is 3.8 days . The time at the end o...

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  7. The inteisity of gamma radiation from a given source is I(0) . ...

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  8. A freshly prepared radioactive source of half-life 2 h emits radiation...

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  9. Radioactive element decays to form a stable nuclide, then the rate of ...

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  10. Radium ""^(226) Ra , spontaneously decays to radon with the emission o...

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  11. A gamma ray photon creates an electron-positron pair. If the rest mass...

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  12. Half-life of a radioactive substance is 20 minutes. Difference between...

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  13. A radioactive nucleus undergoes alpha-emission to form a stable elemen...

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  14. The fossil bone has a .^(14)C : .^(12)C ratio, which is [(1)/(16)] of ...

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  15. A radioactive nucleus undergoes a series of decay according to the s...

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  16. A star initially has 10^(40) deuterons. It produces energy via the pr...

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  17. The rest mass of a deuteron is equivalent to an energy of 1876 MeV, th...

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  18. The compound unstable nucleus ""(92) ^(236) U oftendecays in accordanc...

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  19. What is the power output of a .(92) U^(235) reactor if it is takes 30 ...

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  20. In the options given below, let E denote the rest mass energy of a nuc...

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  21. The radioactivity of a sample is R(1) at a time T(1) and R(2) at time ...

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