The cathode of a photoelectric cell is changed such that the work function changes from ${W_1}$ to ${W_2}\left( {{W_2} > {W_1}} \right).$ If the current before and after change are ${I_1}$ and ${I_2},$ all other conditions remaining unchanged, then (assuming $hv > {W_2}$)

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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

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The cathode of a photoelectric cell is changed such that the work function changes from

{W_1}

{W_2}\left( {{W_2} > {W_1}} \right).

If the current before and after change are

{I_1}

and

{I_2},

all other conditions remaining unchanged, then (assuming

hv > {W_2}

)

View answer and explanation

Correct option: A

{I_1} = {I_2}

Option A (

{I_1} = {I_2}

) is correct because the current depends on the number of photoelectrons emitted, which is determined by the intensity and frequency of the incident light, not the work function (as long as

hv > W_2

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