Max Photo Current Calculation Using Platinum's Work Function

[xago]

1. Platinum has a very high work function of w_o = 6.35 eV.What is the maximal photo current I_o that can be achieved with an irradiation power of
P = 1.27 W ?

Homework Equations

hf = w_o

The Attempt at a Solution

Well, Since the only information they give here is the work function, then i assume that it is related to the voltage. I'm trying to use P=VI to find I but it's the voltage part that's confusing me.

 

[nasu]

The current is charge per unit time so it will depend on how many electrons can you break free in one second.
For each one you need the energy wo.
The given power tells you how much energy is available per second...