The maximum velocity of the photoelectrons emitted by a metal surface is $9 \times 10^5 \text{ m/s}$. The value of ratio of charge (e) to mass (m) of the photoelectron is $1.8 \times 10^{11} \text{ C/kg}$. The value of stopping potential in volt is
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Stopping potential is independent of the number of electrons and depends only on their maximum speed.