For a certain metal v = 20 and the elec...

For a certain metal `v = 2_0` and the electrons come out with a maximum velocity of `4xx10^(6)" m s"^(-1)` . If the Value of `v = 5 v_0` , then maximum velocity of photoelectrons will be ( `v_0` is the threshold frequency )

`8xx10^(6)` m/s

`16xx10^(6)` m/s

`2xx10^(6)` m/s

`12xx10^(6)` m/s

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