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de-Broglie wavelength of electron in gro...

de-Broglie wavelength of electron in ground state is `2.116Å` then its velocity will be………. `ms^(-1)`

A

`0.034xx10^(8)`

B

`3.4xx10^(8)`

C

`34xx10^(-8)`

D

`0.034xx10^(-8)`

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda=(h)/(P)=(lamda)/(mv)`
`:.v=(h)/(mlamda)=(6.62xx10^(-34))/(9.1xx10^(-31)xx2.116xx10^(-10))`
`:.v=0.034xx10^(8)ms^(-1)`
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