1. (CBSE 2018) Draw graphs showing variation of
photoelectric current with applied yoltage for two
incident radiations of equal frequency and different
intensities. Mark the graph for the radiation of higher
intensity
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The graph I2 corresponds to radiation of higher intensity [Note: Deduct this ½ mark if the student does not show the two graphs starting from the same point.] (Also accept if the student just puts some indicative marks, or words, (like tick, cross, higher intensity) on the graph itself. Detailed Answer : The graph between photo electric current i and applied voltage V of equal frequency and different intensity I1 and I2, where I2 > I1, dark line shows higher intensity.
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