If maximum velocity with which an electron can be emitted from a photo cell is `4 xx 10^(8) cm//sec` , the stopping potential is

If maximum velocity with which an electron can be emitted from a photo cell is `4 xx 10^(8) cm//sec` , the stopping potential is (mass of electron ` = 9 xx -31 kg`)
A. 30 volt
B. 45 volt
C. 59 volt
D. Information is insufficient

If maximum velocity with which an electron can be emitted from a photo cell is `4 xx 10^(8) cm//sec` , the stopping potential is (mass of electron ` =

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