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The stopping potential of a photoelectri...

The stopping potential of a photoelectric diode is 9 volts. `e//m = 1.8 xx 10^(11) C kg^(-1)` , then what is its velocity ?

A

`1.8 xx 10^(6)` m/s

B

`1.8 xx 10^(5)` m/s

C

`2.1 xx 10^(5)` m/s

D

`1.8 xx 10^(4)` m/s

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The correct Answer is:
B
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