For a certain metal v = 2 v(0) and the e...

For a certain metal `v = 2 v_(0)` and the electrons come out with a maximum velocity of `4 xx 10^(6)` m/s . If the value of ` v = 5 v_(0)` , then maximum velocity of the photoelectrons will be

`2xx10^7" ms"^(-1)`

`8xx10^7" ms"^(-1)`

`2xx10^6" ms"^(-1)`

`8xx10^5" ms"^(-1)`

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