Question

An electron with kinetic energy E eV collides with a hydrogen atom in the ground state. The collision will be elastic –

• A. For all values of E
• B. For E < 10.2 eV
• C. For E < 13.6 eV
• D. Only for E < 3.4 Ev

Answer 1

Answer: (B)

For E < 10.2 eV

Answer 2

Conceptual.