Question

What is the relation between current frequency/voltage/current and frequency of photons, are emitted?

Answer 1

Photoelectric current does depend on both of them. So frequency basically matters because it decides whether the effect will take place or not. For photoelectric current we first need the photoelectric effect. And it is kick started by the frequency. If the frequency is high enough to eject electrons, that's it,the effect starts.

Answer 2

Hello mate here is your answer.

Some people explained me, that the strength of electric field(and induction of magnetic) of electromagnetic wave is not a power characteristic. The power characteristic is a frequency of photons, which actually are what we call the electric field, and the strength just shows how many photons are, it shows intensity.

So, a charge particle, that doesn't moves(or accelerates, i don't understand yet) radiates an electric field only. When it starts move, it radiates a magnteic field, that actually is the same as a electric field(just a relativistic effect). If to say, according to quantum electrodynamics, it starts radiates a photons with higher frequency, right? So, then we can say, that the velocity of particle influence on force it creates.

Hope it helps you.