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When monochromatic source is kept at distance of 0.2 m from photocell,cutoff voltage obtained is 0.6 V and saturation current is 18 mA.Noe if source is kept at distance of 0.6 m……. |
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Answer» Stopping POTENTIAL will be 0.2 V When distance is CHARGED to 0.6 m (3 times) `1prop (1)/(d^(2))` `therefore (I_(2))/(I_(1))=(d_(1)^(2))/(d_(2)^(2))` `therefore (I_(2))/(I)=((0.2)^(2))/((0.6)^(2))=(1)/(9)` `therefore I_(2)=(I)/(9)=(18)/(9)=2mA` |
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