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A particle of mass 6.6times10^(-30)kg st...

A particle of mass `6.6times10^(-30)kg` starts "(t=0)" moving on a straight line with velocity 10m/s.Its velocity decreases with time,however rate of change of de- Broglie wavelength associated with particle remains constant at `10^(-4)m/s`.(Take `h=6.6times10^(-34)Js` ) :

A) Velocity of the particlae at t = 0.9 s is 1m/s

B) Velocity of the particle at t = 0.9 s is 6 m/s

C) Magnitude of retardation of particle at t = 0.9 s is `4m/s^2`

D) Magnitude of retardation of particle at t = 0.9 s is `1m/s^2`

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