The velocity of an electron in the first...

The velocity of an electron in the first Bohr orbit of hydrogen atom is `2.19 xx 10^(6)ms^(-1)`. Its velocity in the second orbit would be

A

`1.10 xx10^(6) m sec^(-1)`

B

`4.38 xx 10^(6) m sec^(-1)`

C

`5.50 xx 10^(5) m sec^(-1)`

D

`8.76 xx 10^(6) m sec^(-1)`

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The correct Answer is:

A

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