In a linear circuit, if the open-circuit voltage across terminals AB is Vth = 10 V and the equivalent Thevenin resistance is Rth = 103 Ω, what are the values of Norton's current IN and Norton's resistance RN across AB?

While calculating Thevenin resistance (Rth) or Norton resistance (RN), independent constant current sources in the circuit are:

While calculating Thevenin resistance (Rth), constant current sources in the circuit are:

According to the Maximum Power Transfer Theorem, maximum power is delivered from a source to a load when the load resistance (RL) is equal to the internal resistance (r) of the source. At this specific condition, what is the efficiency of the power transfer?