An `alpha`-particle with a kinetic energy of `2.1eV` makes a head on collision with a hydrogen atom moving towards it with a kinetic energy of `8.4 eV`. The collisionA. must be perfectly elasticB. may be perfectly inelasticC. may be inelasticD. must be perfectly inelastic

An `alpha`-particle with a kinetic energy of `2.1eV` makes a head on c

1.	An `alpha`-particle with a kinetic energy of `2.1eV` makes a head on collision with a hydrogen atom moving towards it with a kinetic energy of `8.4 eV`. The collisionA. must be perfectly elasticB. may be perfectly inelasticC. may be inelasticD. must be perfectly inelastic
Answer» Correct Answer - C The maximum kinetic energy avaiable for transition to potential energy`//` exclination energy is: `(1)/(2).(m_(alpha)m_(H))/(m_(alpha)+m_(H)).(V_(rel))^(2)` `=(4m_(1),m_(H))/(5m).(v_(alpha)+v_(H))^(2) " "=(2m)/(5).(v_(alpha)^(2)+v_(H)^(2)+2v_(alpha)v_(H))` `(2m)/(5)[(2.E_(alpha))/(4m)+(2E_(4))/(m)+2sqrt((2E.alpha)/(4m).(2E_(H))/(m))=(2)/(5)[(2.1)/(2)+2xx8.4+2xxsqrt(2.1xx8.4)]` `=10.5 eV gt 10.2 eV` Hence, inelastic collision is possible.

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An `alpha`-particle with a kinetic energy of `2.1eV` makes a head on collision with a hydrogen atom moving towards it with a kinetic energy of `8.4 eV`. The collisionA. must be perfectly elasticB. may be perfectly inelasticC. may be inelasticD. must be perfectly inelastic

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