More new questions »

Answered

In Technology

It is a frequency-domain quantity. In Basic Engineering Circuit Analysis by Irwin, the time domain is written as A*cos(wt+/-THETA) and the frequency domain is written as A*pha…sor(+/-THETA). A series of phasor measurements, taken at regular intervals over time, can sometimes be useful when studying systems subject to variations in frequency. The electric power system is one example. The power grid nominally operates at 50Hz (or 60Hz), but the actual frequency is constantly changing around this nominal operating point. In this application, each individual phasor measurement represents a frequency domain quantity but a time series of phasor measurements is analyzed using time-domain techniques. (http://en.wikipedia.org/wiki/Synchrophasor) (MORE)

Answered

A vector is a physical quantity that has both magnitude and direction (x, y, z; or polar coordinates). A phasor is a mathematical quantity created in electronics to explain AC… behavior; it has magnitude and phase (units in degrees or radians). The phase has nothing to do with the angle in polar coordinates. Alternative Answer A phasor is a rotating vector. Whereas a vector represents quantity and direction, a phasor represents quantity and displacement measured in a counterclockwise direction. Phasors are used in electrical engineering to represent certain AC quantities -e.g. the relationship between current and voltage. (MORE)

Answered

In Technology

Phasor diagram is graphical representation of various electrical parameters in terms of their magnitude and angle.

Answered

Phasors are actually vectors but they represent something specific. Vectors can be used in many situations to represent anything that has magnitude and direction, and in any n…umber of dimensions. Vectors can be used for exactly what phasors are used for, but use of the word 'phase' in 'phase-vector' or 'phasor' carries with it, some implied information: A phase-vector specifically represents a sinusoid by implying in it, a frequency of rotation about the origin point. A single phasor thus has an implied circular locus. The relevance of the angle is with respect to other phasors drawn in the same diagram and the conventional reference is what you would normally draw as the positive horizontal x axis on a common graph. Phase angles are measured in an anti-clockwise direction from that line. A phasor is actually drawn in the Argand plane which accommodates complex numbers. Therefore every location in the Argand plane can represent a phasor typically in one of the following forms: R + j X , R is the real-component and X is the imaginary component |Z|eja , where a s the phase angle (radians), Z is the magnitude of the vector. A( cos(wt) + j sin(wt) ), where w = 2 pi f f = frequency A = amplitude Note: phasors are often used in electronic engineering so the symbol j is used to represent sqrt(-1). In pure mathematics, the symbol i is used. The advantage of encoding so much information into the phasor is that it makes possibly difficult calculations into simple vector additions. For example, it is possible to consider a long phasor as a static reference on the diagram (even though it is implied to be rotating), and place on it's point, another small phasor that rotates compared to the reference. In this case, the dynamic vector sum of the phasors will describe something known as the 'capture effect' in FM radio. (MORE)

Answered

In Technology

Resistance ideal transformer is the one having no core losses, infinite permeability no mmf needed to set up flux), windings are having no resistances or reactances.

Answered

In Science

phasor diagram is nothing but the vectorial representation of time-varying periodic signals(most common are sine and cosine) , whose magnitude is given by the amplitude of the… signal and the direction (angle..) is given by the phase difference. this makes life a lot easier , calculations in vector-algebra domain is more easier when compared to trigonometric domain because here we can resolve any 'n' no. of vectors and by performing simple algebra of addition and subtraction gives us the desired result. Whereas in trigonometric domain we need to expansions like sin(A+B),cos(A-B) etc etc which is a laborious task (MORE)

Answered

An electron is a negatively charged subatomic particle thatoccupies the orbitals around atomic nuclei, allows atoms toparticipate in chemical reactions, is the charge carrier …in metalsfor electrical current, and transports thermal energy in metals. The word electron comes from the Greek word elektron, the word foramber (fossilized tree sap) that when rubbed on wool producesstatic electricity. (MORE)

Answered

In Uncategorized

the 5s because it has better service but it dosent have diffrent colrs just silver gold and black

Answered

"Vector" is a description of magnitude and direction, and can apply to any quantity that has magnitude and direction, such as an aircraft's flight path. "Phasor" is a vector… as used in alternating current electrical/electronic circuits. Calculations are the same as for general-purpose vector math, but the quantities are typically phase angle, voltage, voltage, current, resistance, reactance and impedance. Some calculations will use conductance, admittance and susceptance. (MORE)

Answered

20c + 5 = 5c + 65 Divide through by 5: 4c + 1 = c + 13 Subtract c from both sides: 3c + 1 = 13 Subtract 1 from both sides: 3c = 12 Divide both sides by 3: c = 4