Have tried it but don't really understand what to do.
The photocell is connected to a 12 V supply and a sensitive ammeter which can detect a current of1.0 x 10-9 A. Only 5.0% of the photons of average energy 4.0 x 10-19 J incident on the plate Acause electrons to be released. Calculate the minimum light energy that plate A must absorb persecond for the photocell circuit to detect a current.
I don't think any info from the previous parts of the Q is needed. Any help would be great
But we haven't even met!