CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 1 · Question Q31
Light falls on a photoelectric material and no electrons are emitted. Which of the following quantities when increased will cause electrons to be emitted? I. Intensity of the light II. Frequency of the light III. Wavelength of the light
- (A)I only
- (B)II only
- (C)III only
- (D)I and III only
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