Question

Consider the two following statements A and B and identify the correct choice given in the answers:
A) In photovoltaic cells, the photoelectric current produced is not proportional to the intensity of incident light.
B) In gas filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.

• A. Both A and B are true
• B. Both A and B are false
• C. A is true but B is false
• D. A is false but B is true

Answer 1

Answer: (D)

A is false but B is true

Photo current $\propto$ intensity of light

& $\frac{1}{2}m{v}^2=\frac{hc}{\lambda }-\varphi$

So v depends on $\lambda$.