MCQ
The cathode of a photoelectric cell is changed such that the work function changes from $W$ to $W\left(W_{>} W\right)$. If the current before and after change are $l$ and $l$, all other conditions remaining unchanged, then (assuming $h v>W$ )
  • $I_1=I_2$
  • B
    $I_1<I_2$
  • C
    $I_1>I_2$
  • D
    $I_1\geq I_2$

Answer

Correct option: A.
$I_1=I_2$
The work function has no effect on current so long as $h v>W_0$. The photoelectric current is proportional to the intensity of light. Since there is no change in the intensity of light, therefore $I_1=I_2$.

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