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MHT CET 2024 (16 May, Shift 1) · Photoelectric Experiment: Intensity, Stopping Potential & Graphs

Photoelectric Experiment: Intensity, Stopping Potential & Graphs question from MHT CET 2024 (16 May, Shift 1)

Q37MHT CET 2024 · 16 MAY · SHIFT 1Medium

Photoelectric Experiment: Intensity, Stopping Potential & Graphs

The figure shows the variation of photocurrent with anode potential for four different radiations. Let Ia,Ib,Ic\mathrm{I_a}, \mathrm{I_b}, \mathrm{I_c} and Id\mathrm{I_d} be the intensities for the curves a,b,ca, b, c and dd respectively [fa,fb,fc[f_a, f_b, f_c and fdf_d are frequencies respectively]

Figure

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Answer: (c)

  1. All four curves meet the axis at the same retarding potential, so the frequencies are equal: fa=fb=fc=fdf_a = f_b = f_c = f_d.
  2. Saturation currents rise from aa to dd, and saturation current ∝\propto intensity: Ia<Ib<Ic<IdI_a < I_b < I_c < I_d.
  3. So the answer is (c).
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