The half-life period of a radio-active element X is same as the mean life-time of another radio-active element Y. Initially, they have the same number of atoms. Then
X will decay faster than Y
Y will decay faster than X
X and Y have same decay rate initially
X and Y decay at same rate always
B.
Y will decay faster than X
If M0 is the mass of an oxygen isotope 8O17 , Mp and MN are the masses of a proton and a neutron respectively, the nuclear binding energy of the isotope is
In gamma-ray emission from a nucleus
When 3Li7 nuclei are bombarded by protons, and the resultant nuclei are 4Be8 , the emitted particles will be
The ‘rad’ is the correct unit used to report the measurement of
A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 1 /2 m away, the number of electrons emitted by photocathode would
Mock Test Series
