Dual Nature of Matter

JEE Main level, single correct, medium

187 of 200

Question 187 of 200

The anode voltage of a photocell is kept fixed. The wavelength λ\lambda of the light falling on the cathode is gradually changed. The plate current I\text{I} of the photocell varies as follows :

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Answer: (B)

As λ is increased, there will be a value of λ above which photo-electron will be cease to come out, so photo-current will becomes zero.

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