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In first Bohr orbit of hydrogen atom, th...

In first Bohr orbit of hydrogen atom, the velocity of electron would be (given that radius of first Bohr orbit is `0.53xx10^(-10)m)`

A

`2.2xx10^(6)m//s`

B

`3.3xx10^(6)m//s`

C

`1.1xx10^(6)m//s`

D

`4.4xx10^(6)m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
From Bohr postulate
`mvr=(nh)/(2pi) or v=(nh)/(2pimr)`
`v=(1xx6.625xx10^(-34))/(2xx3.14xx9.1xx10^(-31)xx0.53xx10^(-10))=2.2xx10^(6)m//s`
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