JAMB Physics 2025 Objective — Question 35
Question 35 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
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Which statement about the photoelectric effect is correct?
- A. electrons emitted only when intensity exceeds a threshold
- B. emission begins immediately once frequency exceeds thresholdCorrect
- C. KE of emitted electrons is independent of frequency
- D. number of electrons decreases as intensity increases
Explanation
Emission is instantaneous once frequency exceeds threshold; no time delay.
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