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- The diagram shows apparatus that can he used to investigate the photoelectric effect. light A metal plate Light is shone onto the metal

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- The diagram shows apparatus that can he used to investigate the photoelectric effect. light \\\\ A metal plate Light is shone onto the metal plate. For a particular metal there will only be a current for 'equencies of light greater than 8.17 X 10\" Hz. If the applied potential difference is reversed and increased, the current will decrease and at a certain value of potential difference the current will be zero. Calculate this potential difference when the frequency of the incident light is 9.62 X 10\" Hz

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