# Photoelectric Question (involving a photocell)

1. Oct 10, 2012

1. The problem statement, all variables and given/known data

Monochromatic light of constant intensity falls on a photocell. The graph shows how the current in the photocell varies with the potential difference applied across it.

The frequency of the incident light is 6.0 x 10^14 Hz. Use the graph to estimate the work function of the metal which forms the cathode of the photocell.

Work function = ___

Add to the axes above the graph obtained when only the intensity of the light is increased. Label this graph A.
Add to the axes above the graph obtained when only the frequency of the light is increased. Label this B.

2. Relevant equations

E=hf
Work function = hF0
1eV = 1.6 x 10^-19
Plancks constant (h) = 6.63 x 10^-34

3. The attempt at a solution

Have not attempted because I have no idea where to start or go around getting the solution. And could you explain what I would do for the two graph questions. Thanks for any help in advanced. This is for As level physics.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution