KCET · Physics · Dual Nature of Matter
Light of certain frequency and intensity incident on a photosensitive material causes
photoelectric effect. If both the frequency and intensity are doubled, the photoelectric
saturation current becomes
- A halved
- B quadrupled
- C unchanged
- D doubled
Answer & Solution
Correct Answer
(D) doubled
Step-by-step Solution
Detailed explanation
(D)
We know photoelectric current is directly proportional to the intensity of incident light provided incidentfrequency is
greater than threshold frequency.
\( \therefore \) When intensity is doubled, photoelectric saturation current doubles.
We know photoelectric current is directly proportional to the intensity of incident light provided incidentfrequency is
greater than threshold frequency.
\( \therefore \) When intensity is doubled, photoelectric saturation current doubles.
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