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In photoelectric effect, the stopping potential (V0) v/s frequency (ν) curve is plotted. (h is the Planck's constant and φ is work function of metal) (A) V0 v/s ν is linear (B) The slope of V0 v/s ν curve = φ0 / h (C) h constant is related to the slope of V0 v/s line (D) The value of electric charge of electron is not required to determine h using the V0 v/s ν curve. (E) The work function can be estimated without knowing the value of h. Choose the correct answer from the options given below : (1) (A),(B) and (C) only (2) (C) and (D) only (3) (A),(C) and (E) only (4) (D) and (E) only

1. (1) (A),(B) and (C) only
2. (2) (C) and (D) only
3. (3) (A),(C) and (E) only
4. (4) (D) and (E) only

Correct answer: (3) (A),(C) and (E) only

Solution

The stopping potential versus frequency curve is linear, indicating a direct relationship between the two, which aligns with the principles of the photoelectric effect. The slope of this linear relationship is indeed related to Planck's constant, confirming that the constant h is significant in determining the energy of the emitted electrons. Additionally, the work function can be estimated from the intercept of the curve without needing the exact value of h, making option (E) valid.

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