RE-NEET 2026 Physics Photoelectric Effect MCQ Question
A ray of light with wavelength λ is incident on three different photo-electric cells namely 1, 2 and 3. The threshold wavelength of these photo-electric cells are λ₁, λ₂, and λ₃, respectively and the magnitude of stopping potentials of these cells are V₁, V₂ and V₃, respectively. The relation between λ and threshold wavelengths are λ₁ < λ, λ₂ > λ and λ₃ >> λ. The correct option is:
V₁ = 0, V₂ = V₃
V₁ > V₂, V₃ = 0
V₁ < V₂, V₃ = 0
V₁ = 0, V₂ < V₃
Correct Answer
Detailed Explanation
For cell 1, λ > λ₁, so photoelectric effect occurs and V₁ > 0. For cell 2, λ < λ₂, so no photoelectric effect and V₂ = 0. For cell 3, λ << λ₃, so no photoelectric effect and V₃ = 0.
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