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

Option: 1

Option: 2

Option: 3

Option: 4

Answers (1)

best_answer

The current start flowing only when the wavelength is below a cutoff value, and as we reduce the wavelength current will increase.

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himanshu.meshram

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