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Question

Question: The wavelength of an electron moving with velocity of \(10^{7}ms^{- 1}\)is....

The wavelength of an electron moving with velocity of 107ms−110^{7}ms^{- 1}is.

A

7.27×10−11m7.27 \times 10^{- 11}m

B

3.55×10−11m3.55 \times 10^{- 11}m

C

8.25×10−4m8.25 \times 10^{- 4}m

D

1.05×10−16m1.05 \times 10^{- 16}m

Answer

7.27×10−11m7.27 \times 10^{- 11}m

Explanation

Solution

: λ=hmv=6.626×10−34Js9.11×10−31kg×107ms−1=7.27×10−11m\lambda = \frac{h}{mv} = \frac{6.626 \times 10^{- 34}Js}{9.11 \times 10^{- 31}kg \times 10^{7}ms^{- 1}} = 7.27 \times 10^{- 11}m