Test Preparation on Physics - Nucleus
1.
The penetrating powers of a, b, and g radiations, in decreasing order are:
2.
A sample of radioactive material has mass m, decay constant l, and molecular weight M. Avagadro'sconstant = NA. The initial activity of the sample is :
3.
If radium has half-life of 5 years. Thus for a nucleus ina sample of radium, the probability of decay in ten yearsis:
4.
The binding energies per nucleon for a deuteron and an a-particle are x1 and x2 respectively. What will be the energy Q released in the reaction? 1H2 + 1H2?2He4 + Q
5.
n alpha particles per second are emitted from N atomsof a radioactive element. The half-life of radioactiveelement is :
6.
The half-life period of radium is 1600 years. Its averagelife time will be :
7.
A sample of a radioactive element of 16 g is taken fromKota to Patna in 2 hour and U
8.
The half-life of radioactive substance is 3.8 days. Thetime at the end of which (1/2th)0 th of the radioactivesubstance will remain undecayed is: (givenlog10 e = 0.4343)
9.
The number of nuclei present in a mass m gram ofradioactive element of mass number A is :
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