1. Determine the minimum frequency required to have Photoelectric effect for an EM radiation, when incident on a zinc metal surface.

2. Determine the target material if the threshold frequency of EM radiaion is 5.5x10¹⁵ Hz in a particular photoelectric experimental set up.

3. Determine the maximum kinetic energy of photo-electrons emitted from a Zinc metal surface, if the incident frequency  is 3x10¹⁵Hz.

4. What sould be the stopping potential for photoelectrons if the target material used is Platinum and incident frequency is 2x10¹⁵Hz?

5. What should be the minimum applied potential for complete stoppage of photocurrent in an experimental if the target material is copper and the incident frequency is 2.7x10¹⁵ Hz.