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

7.25 \times 10^{6} m / s

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6.26 \times 10^{6} m / s

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5.25 \times 10^{6} m / s

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4.24 \times 10^{6} m / s

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Solution

The correct option is A $7.25 \times 10^{6} m / s$
By using $λ_{e l e c t r o n} = \frac{h}{m_{e} v} \Rightarrow v = \frac{h}{m_{e} λ_{e}} = \frac{6.6 \times 10^{- 34}}{9.1 \times 10^{- 31} \times 10^{- 10}} = 7.25 \times 10^{6} m / s .$

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

The correct option is A 7.25×106m/sBy using λelectron=hmev⇒v=hmeλe=6.6×10−349.1×10−31×10−10=7.25×106m/s.

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

The correct option is A $7.25 \times 10^{6} m / s$
By using $λ_{e l e c t r o n} = \frac{h}{m_{e} v} \Rightarrow v = \frac{h}{m_{e} λ_{e}} = \frac{6.6 \times 10^{- 34}}{9.1 \times 10^{- 31} \times 10^{- 10}} = 7.25 \times 10^{6} m / s .$