A neutron collies head-on with a station...

A neutron collies head-on with a stationary hydrogen atom in ground state. Which of the following statements is/are correct ?

If kinetic enerfy of the neutron is less than `20.4 eV` collision must be elastic

If kinetic enerfy of the neutron is less than `20.4 eV` collision must be inelastic

Inelastic collision may be take place only when initial kinetic energy iof neutron is greater than `20.4 eV`

Perfectly inelcastic collision can not take place

Text Solution

Verified by Experts

The correct Answer is:

A, C

`K ge 20.4 eV` for inelastic collision

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Lithium and hydrogen atom are in their second excited state. Which of the following statement/s is/are correct ?

Value of electronic angular momentum of hydrogen atom is greater than that of lithium.

Both hydrogen and lithium have same value of electronic angular momentum.

Both hydrogen atom and lithium have same energy

Excitation energy of hydrogen atom is less than that of lithium.

Which of the following statements is correct for stationary waves

Nodes and antinodes are formed in case of stationary transverse wave only

In case of longitudinal stationary wave , compressions and rarefactions are obtained in place of nodes and antinodes respectively

Suppose two plane wave , one longitudinal and the other transverse having same frequency and amplitude are travelling in a medium in opposite directions with the same period , by superposition of these waves , stationary waves cannot be obtained

None of the above

The ionization energy of hydrogen atom in the ground state is

13.6 MeV

13.6 eV

13.6 Joule

Zero