A particle of mass 1mg has the same wavelength as the electron moving with a velocity of 3×106ms−1. The velocity of the particle is (mass of electron =9.1×10−31 kg).
2.7×10−21ms−1
2.7×10−18ms−1
9×10−2ms−1
3×10−31ms−1
A
2.7×10−18ms−1
B
3×10−31ms−1
C
9×10−2ms−1
D
2.7×10−21ms−1
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Solution
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λparticle=λelectron
hmpVp=hmeVe
or, mpVp=meVe
10−6×Vp=9.31×10−31×3×106
∴Vp=2.7×10−18ms−1
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