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The angular momentum of an electron in 4...

The angular momentum of an electron in `4^(th)` orbit is `2xx10^(-34)` Js, then its angular momentum in `5^(th)` orbit is …….

A

`5xx10^(-34)Js`

B

`2.5xx10^(-34)Js`

C

`10xx10^(-34)Js`

D

`2xx10^(-34)Js`

Text Solution

Verified by Experts

The correct Answer is:
B
`l=(nh)/(2pi)`
`:.lpropn`
`:.(l_(4))/(l_(5))=(4)/(5)`
`:.l_(5)=(5)/(4)l_(4)`
`=(5)/(4)xx2xx10^(-34)=2.5xx10^(-34)Js`
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