RC Circuit Prelab #3: Determining Parallel Resistance and Capacitance, Lab Reports of Electrical Circuit Analysis

Download RC Circuit Prelab #3: Determining Parallel Resistance and Capacitance and more Lab Reports Electrical Circuit Analysis in PDF only on Docsity! ECE225L PRELAB #3 DUE: TUESDAY, FEBRUARY 10, 2009 c R p C p + − V 1 ~ R c R p 1 + − V 2 ~ (a) (b) ω p j C R + − v (t) 1 + − v (t) 2 The above RC circuit and its corresponding phasor circuit use the following exact values: Cp = 68 nF, Rp = 2 kΩ, Rc = 5 kΩ, f = 1000 Hz, V1,pp = 10 V. Assume that only the value of the calibrating resistor Rc is known and the values of the parallel elements Rp and Cp are unknown during the measurements. The following measurements were made: V2,pp (V) 2.44 V1,pp (V) 10.0 T (µs) 1000 |∆t| (µs) 90.9 (a) Compute the amplitude ratio A, the phase shift φ in degrees, and deduce measured values of the parallel resistance Rp and parallel capacitance Cp using Equations (15) and (17) in the lab handout. (b) Determine the relative errors made from your measurements using %∆Rp = |Rp,exact −Rp,measured| Rp,exact × 100% (1) %∆Cp = |Cp,exact − Cp,measured| Cp,exact × 100% (2)