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The speed of an electron having a wavelength of $10^{- 10}$ m is

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7.25 x 106 m/s

6.26×106 m/s

5.25×106 m/s

4.24×106 m/s

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detailed solution

Correct option is A

λ=hmv; v=hmλ=6.63X10-349.1X10-31X10-10=7.25X106m/s

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The speed of an electron having a wavelength of 10-10 m is

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The speed of an electron having a wavelength of $10^{- 10}$ m is