Define stopping potential in photoelectric effect.
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Explanation:
The stopping potential is defined as the potential necessary to stop any electron (or, in other words, to stop even the electron with the most kinetic energy) from reaching the other side. What happens in photoelectric effect is that, an incident radiation strikes the surface of the metal
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Stopping potential is that the value of the negative potential given to the collecting electrode A which is just sufficient to stop the most energetic photoelectrons emitted and make the photo current zero.
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