Question

Vo Q1. Assume that Op-Amp as shown above is ideal. Given that RI is 0.23 Ohm, R2 is 1.78 Ohm, R3 is 1.61 Ohm, R4 is 2.225 Ohm. Calculate Vo, V2 & 13. V2 (Volts) Submit Answer Tries 0/5 13 (Amps) Submit Answer Tries o/s Vo (Volts) Submit Answer Tries 0/5 R1 Vo Q2. Assume that Op amp shown is ideal. Given that R1 is 19 Ohm, R2 is 82 Ohm, R3 is 9.5 Ohm, R4 is 205 Ohm. Calculate Vo (Volts) Submit Answer Tries 0/6 R, 10 V -15 V Q3. Assume that Op amp shown is ideal. Given that Ra is 26 KOhm, Rb is 99 KOhm. Calculate Vo for Vs value of 0.4 V. Submit Answer Tries o/s 15V 0V Q4. Assume that Op-Amp shown is ideal. Given that Ra is 3 KOhrn, Rb is 23 KOhm and R is 251 KOhm. Calculate v M) or va of .09 V and Vb of 0.19· Submit Answer Tries 0/5

Answer 1

v^+ = 0 v, and according to virtual ground concept v^- = v^+ v^- = 0 v apply nodal analysis at node v^- 0 - 12/0.23 + 0 - v_2/1.78 = 0 v_2 = -1.78/0.23 times 12 v_2 = -92.8695 v apply nodal analysis of node v_2 v_2 - 0/1.78 + v_2/1.61 + v_2 - v_0/2.225 = 0 v_2 [1/1.787 + 1/1.61 + 1/2.225] = v_0/2.225 v_0 = 0.27 v_2 v_0 = -25.57 v i_3 = v_2/1.61 = -57.683 A (2) ideal op - amp drives zero current hence v^+ = 12 v . according to virtual ground concept v^- = v^+ apply nodal analysis at node v^- 12/R_3 + 12 - v_0/R_4 = 0 v_0 = 12 [1 + R_4/R_3] v_0 = 12(1 + 205/9.5) v_0 = 270.947 v (3) v^+ = 0v, according to virtual ground concept v^- = v^+ v^- = 0 v apply nodal analysis at node v^- 0 - 0.4/26 k + 0 - v_0/99k = 0 v_0 = -0.4 times 99 k/26 k v_0 = -1.523 v (4) v^+ = -v, according to virtual ground concept v^- = v^+ v^- = 0 v apply nodal analysis at