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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A hydrogen atom moves with a velocity and makes a head on inelastic collision with another stationary H-atom. Both atoms are in ground state before collision. The minimum value of if one of them is to be given a minimum excitation energy is

Answer: (B)

Solution

For a perfectly inelastic collision the common speed is and the kinetic energy lost is , which must equal the minimum excitation energy 10.2 eV, so

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Question ID VK-084885