List of top Physics Questions on Kinetic Energy asked in KCET

The natural logarithm of the activity R of a radioactive sample varies with time t as shown. At t=0, there are N₀ undecayed nuclei. Then N₀ is equal to [Take e²= 7.5]

Consider the nuclear fission re action  Assuming all the kinetic energy is carried away by the fast neutrons only
and total binding energies of    MeV and 780 MeV respectively, the average kinetic energy
carried by each fast neutron is (in MeV)

Light of energy E falls normally on a metal of work function \(\frac{E}{3} \). The kinetic energies (K) of the photo electrons are