Phase angle Definition and 83 Threads

Homework Statement At time t = 0 and at position x = 0 m along a string, a rightward (+x dir) traveling sinusoidal wave with frequency of 230 Hz has displacement y = +4.8 mm and transverse velocity vy = -0.75 m/s. What is the smallest positive phase angle? What is the amplitude of the...

Homework Statement What is the initial phase angle of this graph that describes a simple harmonic motion? Homework Equations The Attempt at a Solution I don't have any clue about how to find it by watching the graph, I know only an equation to find it. Any help please.

I try to extract optical constants (complex refractive index) from the spetral reflectance data - R(omiga), the common method is using Kramers-Kronig relations to calculate the Phase information of the reflection - Psi(omiga), then according to the normal reflection coefficients, the complex...

An inductor “L” is connected in series with a Resistor “R”. This circuit is connected to a sinusoidal voltage “V”, and a current of 1A flows. If the circuit resistor has a value of 1W, and the magnitude of the reactance of the inductor “L” is 1W at the supply frequency, state: (i) The...

Homework Statement Hi, I am slightly confused by which variation of phase angle formula to use relating between the current and voltage. Would this still be (tan-1 XL-XC/R) for a RLC parallel circuit? Voltage = 90V ac Xc/Z1 = (9 - j4) XL/Z2 = (12 + j15) Current = 11.27 Amps Total...

Homework Statement An ac generator has a frequency of 4.80 kHz and produces a current of 0.0400 A in a series circuit that contains only a 231-Ω resistor and a 0.250-µF capacitor. Obtain the voltage of the generator and the phase angle between the current and the voltage across the...

Homework Statement hi in current transformer the primary current lags the secondary current by an angle..to determine the %ratio error we need to measure the ratio of primary and secondary current...so we use a RC circuit to lead the primary current so that it could be in same phase as...

Homework Statement An AC power supply with a peak volatge output of 200 volts, operating at 60 Hz, is connected to a 53 microFurad capacitor A) what is the difference in phase angle between the applied voltage and the current B) what is the rms current in the circuit C) what is...

Homework Statement If a complex voltage and current are related by the expression v(t) = ( - 1 + j (3)^(1/2) ) i(t) What is the phase angle? Note j = sqrt(-1) Homework Equations The Attempt at a Solution So is the phase angle simply tan inverse (sqrt (3) / -1 )?? Or do I...

Homework Statement I am given a RLC circuit in series with a fully charged C. There is no applied voltage at this part of the problem. Using kirchhoff I arrive at a second order diff.eq which leads me to the (correct) solution for the charge in the capacitor: q(t) = Q0exp(-t/T)cos(wt + Ø)...

Phase Angle / Phase Question - Simple Harmonic Motion Homework Statement If I were given a function of displacement for simple harmonic motion in the form of: x = Acos(\omegat + \phi) Would the phase angle, \phi, always be the same? Say if I derived the equations into forms for...

Homework Statement Pls see the attachment. Homework Equations The Attempt at a Solution Obviously I have B and C correct but for a the only thing I can find is tan(phi)=XL-Xc/R This seems to be for a series RLC circuit though and I only have RC. also I know that the current lags...

Hi, I have the following circuit [PLAIN]http://img707.imageshack.us/img707/3024/upgp580.png And i need to find the phasor current I, the power, reactive power and apparent power delivered by the source and state whether it's lagging or leading. But I am kind of stuck at the first step. First...

Hi , there is a circuit with AC voltage with a resistor followed by a capacitor in series, and at frequency 1760 Hz I need to know phase angle, the peak to peak separations for the voltage source to the voltage across the capacitor is 15 ms...how do I find the phase angle? I already found it...

Phase angle?? L-C series Homework Statement In an L-C series circuit with very small resistance, the voltage drops across inductor and capacitor are 100V and 120V,. What's the phase angle? Homework Equations tantheta= Xl -Xc)/ R The Attempt at a Solution According to book's...

Homework Statement The question reads: Two identical pendulums have the same amplitude and the same length (20cm) At time t = 0, one pendulum reaches the end of its swing at x = +6 cm. At the same time the second pendulum has velocity v = -27 cm/s and sits on opposite ends of the...

Magnitude and Phase Angle for Nyquist Plots Homework Statement The assignment is to draw a Nyquist Plot of a certain transfer function. The problem is that I can't figure out how they got the angle for the plot. G(s) = \frac{k(s+2)}{(s+1)(s-3)} Homework Equations...

Homework Statement Three light waves combine at a point where their electric field components are E1 = Eo sin \omegat E2 = Eo sin (\omegat - 2\pi/3) E3 = Eo sin (\omegat + \pi/3) Find the resultant amplitude of the electric field ER at that point and it's phase angle\beta Write...

Homework Statement A transmission line has the following properties: L_{0} = 1 mHm^{-1} C_{0} = 10 \mu F m^{-1} R_{0} = 10 \Omega m^{-1} G_{0} = 0 \Omega^{-1} m^{-1} That is, inductance per meter, capacitance per metre etc. The line is 10m long. The problem is to find the...

I have a question asking for the period, frequency, amplitude and phase angle from simply looking at a graph. I have the period and frequency, and 'think' i have the amplitude (high point - low point / 2), but I don't know how to get the phase angle. No equation is given so I can't simply...

Can someone show me how they got this: \frac{\omega_n^2}{-\omega^2+j2 \zeta \omega_n \omega} Has this phase: -90-tan^{-1} \frac{ \omega}{2 \zeta \omega_n} Why isn't it simply: 0 -tan^{-1} \frac{- 2 \zeta \omega_n}{ \omega}

Propagating wave find initial phase angle?? A wave is propagating down a string having a diameter of 0.0013 m and a density of 5240 kg/m3. The wave has the form y = A sin(k x - w t + beta) where A = 0.011 m, w = 59.8 rad/s, and k = 72.4 rad/m. the velocity of propagation of the wave is...

A wave is propagating down a string having a diameter of 0.0013 m and a density of 5240 kg/m3. The wave has the form y = A sin(k x - w t + beta) where A = 0.011 m, w = 59.8 rad/s, and k = 72.4 rad/m. the velocity of propagation of the wave is 0.825967 m/s The transverse speed @ y/@t is...

At resonnance, the phase angle in an a.c circuit is ?pls need an answer. 2. the magnetic force on a charged particle moving with velocity v is ? 3. The current through a resistor in a.c circuit is given as 2 sin wt. Determine the d.c equivalent of the current? 4. What is the angle of dip at...

Homework Statement A block, attached to a spring, moves in Simple Harmonic Motion on a horizontal frictionless table. The displacement from equilibrium is given by x = xm cos (ω t + φ ) where x is positive to the right of the equilibrium position. The frequency of the motion is 3.10 Hz and...

A transverse, sinusoidal wave is traveling along a string. It moves in the negative x-direction, and it has an amplitude of 5 cm. At time t=0, the point at x=0 is at a displacement of 4 cm and is traveling upward. What is the phase angle in degrees? Homework Equations x = A*cos(\omega*t+\phi)The...

For two phasors a and b, with magnitudes of A,B respectively and phase angles of \phi_{a) and \phi_{b}, the angle of the sum of the phasors (call it p) has a magnitude of: P^{2} = A^{2} + B^{2} , and a phase angle of: \phi_{p} = -tan^{-1}(\frac{B}{A}) The magnitude identity makes...

Homework Statement We are working with phasors and R-L-C circuits. Here is some given data: Vsource = 120 Volts, 60 Hz Resistor = 100\Omega Capacitor = 50\muF Inductor = 0.2 H Inductor Resistance = 10\Omega My question is this, when solving for current using V = IZ, can you set...

question 1) If a simple harmonic oscillation is described by the function x = A sin (wt + phi) would phi be the opposite of what it would be for a SHM described by the function x = A cos (wt + phi) I.e if the graph for for x = A sin (wt + phi) , when t = 0, x = +A. would phi be equal to pi...

Well this isn't a h/w problem, rather its one I have myself. I have two speakers, speaker one sits in its enclouser horizontal. Speaker 2 sits 58 Degrees out of phase with speaker one. ( See Drawing #1). If I could somehow change the phase angle, would that change the imaging of the speaker...

Hi Does anyone know the equation for the phase angle by which v0 leads v1 in a bandstop (parallel resonant) circuit? also, can anyone tell me how (in terms of the equation for the transfer function) a bandstop filter works? Thanks a lot, any help appreciated. :redface:

Question: A frictionless block of mass 2.35 kg is attached to an ideal spring with force constant 310 N/m. At t=0 the spring is neither stretched nor compressed and the block is moving in the negative direction at a speed of 12.6 m/s. 1. Find the amplitude. I got this without a problem...

Here's a tricky one... A resistor is in series with an inductor, with the current (I) lagging behind the voltage (V) by 60degrees. I am given the impedance (Z) of the circuit, which is 350ohms. How the heck can I find the resistance (R) and the inductive reactance (XL) when I know only the...