In the Figure above, I was asked to determine which diagram refers to the relation between current frequency and the intensity of the current in an ohmic resistance. I am confused between (2) and (3). Why (2)? Because it is an alternative current, and it is determined from the equation:
i(max)= Vmax/R (R is constant but Vmax=NBA(2πf)) so current would be proprtional to frequency.
Why (3)? Because I thought that in the AC source both voltage and frequency are adjustable as desired, so the change in frequency doesn't imply a change in voltage, so the intensity of current would be stable. But anyway, I am waiting your help to understand what is the correct answer.