ABSTRACT
Use the impedance to get the differential equation relating the terminal current to the terminal voltage. 7-38. Using the known behavior of Land Cat very high and very low frequencies, show simplified versions of circuits:
a. Figure P7-2 at very low frequencies b. Figure P7-2 at very high frequencies c. Figure P7-3 at very low frequencies d. Figure P7-3 at very high frequencies e. Figure P7-4 at very low frequencies f. Figure P7-4 at very high frequencies g. Figure P7-5 at very low frequencies h. Figure P7-5 at very high frequencies
7-39. Take all R = 100 ohms, all C = I j.tF, all L = O.Ql Hand apply a 60-Hz sinusoidal voltage of 110 volts effective value to the circuit terminals. Find the current, power factor angle, power factor, and average power for the circuits of:
a. Fig. P7-2 c. Fig. P7-4 b. Fig. P7-3 d. Fig. P7-5
7-40. The circuit of Fig. 7-28c uses the varistor of Fig. 3-2c as the resistance element and has L = 1.0 H. Using SIMULINK or other available simulation find the current if:
a. Voltage e; is a step of + 10 volts from zero. b. Voltage e; is steady at +10 volts and then drops in step fashion to zero. c. Voltage e; is steady at +8 volts and then jumps to + 10 volts. Also do a
tical solution and compare with the exact result.
