MCQ
Three specimens $\text{A, B, C}$ of same radioactive element has activities $1$ microcurie, $1$ rutherford and $1$ becquerel respectively. Which specimen has maximum mass?
- A$A$
- ✓$B$
- C$C$
- DAll have equal masses.
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Assertion $A$ : The photoelectric effect does not take place, if the energy of the incident radiation is less than the work function of a metal.
Reason $R$ : Kinetic energy of the photoelectrons is zero, if the energy of the incident radiation is equal to the work function of a metal.
In the light of the above statements, choose the most appropriate answer from the options given below
The speed of daughter nuclei is
