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A solar cell generates a potential difference of 0.1V when a 250 Q is connected across it, and a potential difference of 0.3 V

A solar cell generates a potential difference of 0.1V when a 250 Q is connected across it, and a potential difference of 0.3 V when a 1000 Q resistor is substituted. The emf of the cell is: 3.0 volts volts 0.3 0.9 volts 6.0 volts 0.6 volts

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