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Question

Question: The speed of an electron having a wavelength of 10<sup>–10</sup> m is –...

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

A

7.25 × 106 m/s

B

6.26 × 106 m/s

C

5.25 × 106 m/s

D

4.24 × 106 m/s

Answer

7.25 × 106 m/s

Explanation

Solution

v = hmλ\frac{h}{m\lambda} =6.6×10349.1×1031×1010\frac{6.6 \times 10^{- 34}}{9.1 \times 10^{- 31} \times 10^{- 10}}= 7.25 × 106 m/s