In photoelectric effect, the stopping potential (V₀) v/s frequency ( u) curve is plotted. (h is the Planck's constant and φ₀ is work function of metal) (A) V₀ v/s u is linear. (B) The slope of V₀ v/s u curve =(φ₀)/h. (C) h constant is related to the slope of V₀ v/s u line. (D) The value of electric…

Question

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

Accepted Answer

(3) (A), (C) and (E) only. Write the relation as V₀=h/e
u-(φ₀)/e. (A) The relation is of the form y=mx+c, so the plot is a straight line. True. (B) The slope is h/e, not φ₀/h. False. (C) The slope does carry h, since h=e×slope. True. (D) That same expression needs e, so the charge is required. False. (E) The intercept on the V₀ axis is -φ₀/e, so φ₀=e×|intercept| with no h anywhere. True. Correct set: (A), (C) and (E).

Step-by-step solution

Why the other options are wrong