Derive the output voltage (Vol, Voz and Vas) of cach Op-Amp in Figure QI. Va Ra Rb U1 ww Vo1 U2 Vb VO2 Ry Rx Rd U3 VO3 4 RI Figure Q1

2. Assuming ideal op amps, find the voltage gain vo/vin and input resistance Rin in each of the following circuits in Figure p2.8 100 ΚΩ 100 ΚΩ 20 ΚΩ 20 ΚΩ να www νο Μ 20 ΚΩ * 0 Figure P2.8 20 ΚΩ (a) 100 ΚΩ M + (c) Ον Τα να 20 ΚΩ Μ W 20 ΚΩ (b) 100 ΚΩ M + (d) wi στο 20 ΚΩ 9 Τ

A balanced positive sequence Y-connected source with the phase voltage Van = 10010° V isconnected to a ∆-connected balanced load ZΔ = (8 + j4) Ω per phase. Calculate (1) the phase currents IAB,IBC, ICA; (2) line currents Ia, Ib, and Ic

Q1 (a) (b) Considering an op-amp, define what is meant by input offset voltage (Vos) and explain what causes it. Figure Qla shows an integrating amplifier with zero input. Derive an expression for the output voltage, Vo, and explain the effect that Vos will have on its operation. R W Vos C Figure Qla A •V₂