Electrical Engineering Fundamentals By Vincent Del Toro Pdf ★ <LEGIT>

Part D — Essay & synthesis (20 pts) Choose one of the two prompts (answer thoroughly, ~300–500 words):

Problem 2 — Transient of RL network (15 pts) An inductor L=50 mH, resistor R=10 Ω, and a 5 V step source are connected in series. At t=0 switch closes. a) (7 pts) Derive i(t) for t≥0. b) (4 pts) Compute the energy stored in the inductor at t = τ (one time constant). c) (4 pts) Numerically evaluate i(t) and stored energy at t=τ. (Show numeric τ.) electrical engineering fundamentals by vincent del toro pdf

Duration: 3 hours Total points: 200

Problem 3 — AC steady-state & phasors (18 pts) Given: Vs = 10∠0° V, series network: R=50 Ω, L=100 mH, C=10 μF, frequency f=1 kHz. a) (6 pts) Convert L and C to reactances; compute total impedance Z and current phasor I. b) (6 pts) Compute voltage phasors across each element and verify KVL. c) (6 pts) Compute real power delivered by the source and reactive power. Part D — Essay & synthesis (20 pts)

Problem 9 — Practical measurement & instrumentation (15 pts) You must measure a small AC voltage (peak 20 mV) in presence of large common-mode interference (~10 V) using an instrumentation amplifier built from op-amps. a) (6 pts) Sketch the schematic conceptually (describe stages: input filtering, INA, gain, common-mode rejection). b) (5 pts) Choose an INA gain to get ~2 V full-scale output and compute resistor values or gain-setting component. c) (4 pts) List three practical techniques to maximize CMRR and reduce noise in this measurement. b) (4 pts) Compute the energy stored in

Part C — Design, analysis & applications (50 pts) Problem 7 — Filter synthesis & Bode (20 pts) Design a second-order Butterworth low-pass filter with cutoff fc = 1 kHz using an active Sallen–Key topology with unity gain buffer. Use standard component values within a factor of two. a) (6 pts) Provide component values (R1, R2, C1, C2) and show normalized component selection for Butterworth (Q=0.707). b) (6 pts) Derive the transfer function H(s) and show the -3 dB cutoff condition. c) (8 pts) Sketch (or describe numerically) magnitude Bode plot points at 10 Hz, 100 Hz, 1 kHz, 10 kHz, and 100 kHz (provide gains in dB).

Problem 4 — Resonant circuits & bandwidth (12 pts) A series RLC has R=20 Ω, L=100 μH, C chosen so resonant frequency fr = 1 MHz. a) (4 pts) Find C. b) (4 pts) Compute Q factor and bandwidth (BW). c) (4 pts) If R is halved, state qualitatively how fr, Q, and BW change.