Question 11: Dual Nature of Matter and Radiation

Question

Which of the following statement is wrong regarding the photo electric effect.

Accepted Answer

The incorrect statement is Option B.
Explanation:
Photoelectric current Ã¢ÂÂ intensity of the incident light
Ã¢ÂÂ More photons per second Ã¢ÂÂ more emitted electrons Ã¢ÂÂ higher current.
(So Option A is correct.)
The maximum kinetic energy of emitted electrons depends on frequency, not intensity.
Ã¢ÂÂ EinsteinÃ¢ÂÂs photoelectric equation:
$$K_{\max} = h
u - \phi$$
where
Ã¢ÂÂ¢ $h$ is PlanckÃ¢ÂÂs constant
Ã¢ÂÂ¢ $
u$ is the lightÃ¢ÂÂs frequency
Ã¢ÂÂ¢ $\phi$ is the work function of the material
(So Option B is wrong.)
Since $K_{\max} = h
u - \phi$, it indeed depends on $
u$.
(Option C is correct.)
The stopping potential $V_0$ satisfies
$$eV_0 = K_{\max} = h
u - \phi$$
Ã¢ÂÂ $V_0$ increases linearly with $
u$.
(Option D is correct.)

Answer

Photo electric current is directly proportional to the intensity of the incident radiation

Answer

The maximum kinetic energy of the electrons emitted depends on the intensity of the incident radiation

Answer

The maximum kinetic energy of the electrons emitted depends on the frequency of the incident radiation

Answer

The value of the stopping potential increases with the increase in frequency of the incident radiation.

Dual Nature of Matter and Radiation

Which of the following statement is wrong regarding the photo electric effect.

Choose the correct answer: