Question

Find Vout for circuit 1 find Vout and I (current) for circuit 2 find Vout for circuit 3

Vo Find Vo + 4K 2K Find I, Vo I Yo 2k ZK 10 MA Find vo

Answer 1

(0) Yo V By vistal short urcut Concept vt vil here vtv So ver Output is the short circuit with the inverting terminal so Vo=v- Vo=V output voltage is just equal to the lupht voltage. So This is called Buffer. (2) Чk Ž{TH BV Vo 2K By virtual short circuit (vtv- here vtov So IVE OV Apply KCL at node a 8-v-v=vo 2 4

8.0 o-vo 4 Vo= 8 X Y = -16 2 Vo=-16 v I= B-V 8-0-4 2 2 I-4MA 2K. vo loma No current can enter and Exit from opamp so all current will passes through feedback sesistance. Vistual short ckt v tov so v=ov Apply ka at a point 10 mA = V-vo 2 10 = o-Vo Vo=-20v An