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Question

If the momentum of an electron is changed by P, then the de-Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:



Correct Answer
A

200P

Your Answer
B

400P

Your Answer
C

P200

Your Answer
D

100P


Solution

The correct option is B

200P


λ=hp[de -Brogli wavelength]
P=hλΔPP=ΔλλPPinitial=0.5100Pinitial=200P

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