Since the exact circuit diagrams are missing from the question, the condition for forward bias is described. A p-n junction diode is said to be forward-biased when its p-side (anode) is maintained at a higher electrical potential than its n-side (cathode), i.e., $V_p > V_n$. In contrast, if the p-side is at a lower potential than the n-side ($V_p < V_n$), the diode is in a reverse-biased condition.