Q-3 For the following pairs of voltages and currents, indicate whether the element involved is a capacitor, an inductor, or a resistor, and find the value of C, L, or R if sufficient data are given: a. v = 550 sin(3771 +50) i = 11 sin(377t - 40) b. v = 36 sin(754t 80) i = 4 sin(7541 - 170°) c. v = 10.5 sin(ot 13") i - 1.5 sin(ot -13°)

Q-3 For the following pairs of voltages and currents, indicate whether the element involved is a capacitor, an inductor, or a resistor, and find the value of C, L, or R if sufficient data are given: a. v = 550 sin(3771 +50) i = 11 sin(377t - 40) b. v = 36 sin(754t 80) i = 4 sin(7541 - 170°) c. v = 10.5 sin(ot 13") i - 1.5 sin(ot -13°)

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter3: Magnetic Starters

Section: Chapter Questions

Problem 30SQ

See similar textbooks

Similar questions

Convert the following instantaneous currents to phasors, using cos(t) as the reference. Give your answers in both rectangular and polar form. (a) i(t)=5002cos(t30) (b) i(t)=4sin(t+30) (c) i(t)=5cos(t15)+42sin(t+30)
Given the following pairs of voltages and currents, indicate whether the element involved is a capacitor, an inductor, or a resistor, and determine the values of C, L or R where ω= 157 rad/s a. v = 2000 sin ωt ; i = 5 cos ωt b. v = 80 sin(157t + 150°); i = 2 sin( 157t + 60°) c. v = 35 sin(ωt − 20°); i = 7 cos( ?? − 110°)
Given the following pairs of voltages and currents, indicate whether the element involved is a capacitor, an inductor, or a resistor, and determine the values of C, L or R. (if sufficient data are given) a.) v = 550 sin(377t + 50°); i = 11 sin(377t − 40°) b.) v = 36 sin(754t − 80°); i = 4 sin(754t − 170°) c.) v = 10.5 sin(ωt − 13°); i = 1.5 sin(ωt − 13°)
Using the phase shift of 72º from the Experiment, determine the inductance value, L, of the inductor shown. Vr(t) =3.7272 cos(4000 t - 72°) [V]
A capacitor and a 30-ohm resistor are connected in series. What is the equation of the resulting current if that capacitor has a capacitance of 80 microfarads and the combination is placed across a power supply whose equation is e = 325 sin (314t)? a.) i(t) = 6.52 sin (314t - 53°) b.) i(t) = 6.52 sin (314t + 53°) c.) i(t) = 6.53 sin (314t + 52°) d.) i(t) = 6.53 sin (314t - 52°)
A 100 Hz ac circuit has a 300 ohm resistor, a 900 milli-henry inductor, and a capacitor all in series. The Capacitive Reactance is 165.49 ohms. The current from the source is 200 amps. Keep final answers to 2 decimal places. Use Pi = 3.14159 for all calculations. What is the value of the capacitor (in Scientific Notation)? What is the impedance of the circuit? What is the Inductive Reactance?
QA) The apparent power for an electric network was measured and found to be 360.6VAZ-56.34% 1. Determine the power factor of the network and sketch the power triangle. 2. Identify the elements of the network and provide a reason justifying your answer. B) Define the permeability (ur) of the material. If you are required to design IH and I uH inductors, what type of core will you use in your design and why? support your answer by equations.
Given a parallel RLC circuit comprised of the following element: 63.92-ohm resistor, ideal inductor with reactance of 46.65 ohms; and a capacitor with reactance of 8.65 ohms. Compute for true power in watts given an ac voltage source of 100 cis 0 volts. Compute to the nearest 4 decimal places. No Scientific notation. Do not round off in the middle of calculation. Use stored values.
A series connection of a 30-ohm resistor and a 100-mH inductor is connected across 240-V, 60-Hz supply. What will be the resulting equation of the current? a. i(t) = 7.04 sin(377t + 51.49°) b. i(t) = 7.04 sin(377t - 51.49°) c. i(t) = 4.98 sin(377t - 51.49°) d. i(t) = 4.98 sin(377t + 51.49°)
Given a parallel RLC circuit comprised of the following element: 76.19-ohm resistor, ideal inductor with reactance of 72.41 ohms; and a capacitor with reactance of 16.55 ohms. Compute for true power in watts given an ac voltage source of 100 cis 0 volts.
Given a parallel RLC circuit comprised of the following element: 72.06-ohm resistor, ideal inductor with reactance of 69.81 ohms; and a capacitor with reactance of 10.98 ohms. Compute for reactive power in VArs given an ac voltage source of 100 cis 0 volts. Give only the absolute value. PLEASE ANSWER WITHIN 30 MINUTES. Round off to the nearest 4 decimal places. No Scientific notation. Do not round off in the middle of calculation. Use stored values. Write the numerical values only. No units in your final answer. Spaces are not allowed.
The resistance and inductance of a coil can be obtained by connecting the coil in series with a known resistance R and measuring the coil voltage Vcoil, the resistor voltage Vr and the total voltage V. The frequency must also be known, but the phase angles of the voltages are not known. Given that f = 60 Hz, R = 10 ohms, Vcoil = 22.4 V, Vr = 20 V and V = 36V. Calculate Xl and Xc