1.

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

Answer»

`5xx10^(-34)Js`
`2.5xx10^(-34)Js`
`10xx10^(-34)Js`
`2xx10^(-34)Js`

SOLUTION :`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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