CAPE Physics Unit 2 · 2010 · Paper 1 · Question Q31
Which of the following observations is/are associated with the photoelectric effect? I. Photoelectrons are emitted from the surface of the metal as soon as light of frequency greater than the threshold frequency is incident on it. II. The photoelectric current is independent of the intensity of incident radiation. III. There is a cut-off wavelength for the incident radiation on the metal surface, below which no photoelectrons are ejected.
- (A)I only
- (B)I and II only
- (C)I and III only
- (D)II and III only
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