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On the basis of the figure describing photoelectric effect, which of the following statement is correct?

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Na and Al both have the same threshold frequency.

Maximum kinetic energy for both the metals depend linearly on the frequency.

The stopping potentials are different for Na and AI for the same change in frequency.

Al is better photosensitive material than Na.

answer is B.

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Detailed Solution

Stopping potential equals to maximum kinetic energy since, stopping potential is varying linearly with the
frequency. Therefore, maximum KE for both the metals also vary nearly with frequency.

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