1.

In the question number 59, the value of velocity of therevolving electron is

Answer»

`1.2xx10^6ms^(-1)`
`2.2xx10^6ms^(-1)`
`3.2xx10^6ms^(-1)`
`4.2xx10^6ms^(-1)`

SOLUTION :As `v=(e)/(sqrt(4piepsilon_0mr))`
Here, `e=1.6xx10^(-19)C,m=9.1xx10^(-31)KG,r=5.3xx10^(-11)m`and `4piepsilon_0=(1)/(9XX10^(9))N^(-1)m^(-2)C^(2)`
`therefore v=(1.6xx10^(-19))/sqrt((1)/(9xx10^(9))xx9.1xx10^(-31)xx5.3xx10^(-11))`
`=2.2xx10^6ms^(-1)`.


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