4.68 Find the Norton equivalent with respect to the ter- P minals a.b in the circuit in Fig. P4.68. 138 Techniques of Circuit Analysis Figure P4.68 15 kfl 1 10 mA 10 kn 3 mA 5 kn 30 V 4.96 Use the principle of superposition to find the volt- PSPICE age v, in the circuit in Fig. P4.96. MULTISIM Figure P4.96 50 240 V 184 V 70 10 16 A