A) must be elastic
B) may be partially elastic
C) may be completely inelastic
D) may be completely elastic
Correct Answer: A
Solution :
Key Idea: In elastic collision energy an momentum both are conserved. In hydrogen atom\[{{E}_{2}}-{{E}_{1}}=10.2eV\]. Since, energy difference is\[10.2eV\]. Which is greater that kinetic energy \[5eV\] the electron excites the hydrogen atom, hence collision in elastic.You need to login to perform this action.
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