When the RL changes how does this affect the Nortons or Thevenins equivalent circuit?

When the load resistance (RL) changes, it affects the Norton or Thevenin equivalent circuit by altering the output voltage and current delivered to that load. For a Thevenin equivalent, the output voltage can change based on the voltage divider effect, while for a Norton equivalent, the output current will vary according to the current division principle. This means that the values of the equivalent voltage source (Vth) or current source (In) remain constant, but the load will experience different voltage and current levels depending on its resistance. Consequently, the overall power delivered to the load will also change.