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The operator 'j' represents the imaginary unit in alternating current circuits. It is used to denote the phase difference or angular displacement between voltage and current waveforms in complex impedance calculations. The use of 'j' helps in simplifying mathematical calculations in AC circuits by treating the impedance as a complex number.
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Why time isn't an operator in quantum mechanics?
Associated with each measurable parameter in a physical system is a quantum mechanical operator. Now although not explicitly a time operator the Hamiltonian operator generates the time evolution of the wavefunction in the form H*(Psi)=i*hbar(d/dt)*(Psi), where Psi is a function of both space and time. Also I don't believe that in the formulation of quantum mechanics (QM) time appears as a parameter, not as a dynamical variable. Also, if time were an operator what would be the eigenvalues and eigenvectors of such an operator? Note:A dynamical time operator has been proposed in relativistic quantum mechanics. A paper I found on the topic is; Zhi-Yong Wang and Cai-Dong Xiong , "Relativistic free-motion time-of-arrival", J. Phys. A: Math. Theor. 40 1987 - 1905(2007)
What is the effect of density on conductivity?
*Electrical conductivity or specific conductivity [sigma] is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density J to the electric field strength E : J=Sigma.E
When are voltage and current out of phase?
Because the impedance of the inductor and capacitor is not a real resistance / has an imaginary value that causes voltage and current to be out of phase. An inductor's impedance is equivalent to j*w*L (j = i = imaginary number, w = frequency in radians, L = inductance), while a capacitor's impedance is 1/ (j*w*C). The 'j' causes the phase shift.
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of?
You will need 8 drops of chain. So the operator must apply 250 newtons to the 8th drop. The other 7 drops of chain must be reeved through the pulley system.
What does the j in j Robert oppenheimer mean?
the J on J Robert Oppenheimer means Julius....
What has the author Edgar J Black written?
Edgar J Black has written: 'Radio valves' 'Alternating current and acoustics'
What has the author D J Bradley written?
D. J. Bradley has written: 'THE OPERATOR'
What has the author John J O'Neill written?
John J. O'Neill has written: 'Prodigal genius' -- subject(s): Electric engineers, Biography, Electric currents, Alternating, Electric engineering, History, Alternating Electric currents
How do you relate AC and DC voltage by means of complex numbers?
A complex number is a combination of real and imaginary numbers. An example of a complex number is the expression (a + jb), in which the letter j is called an 'operator'. In this example, the operator +j indicates that the quantity b is acting at an angle of +90o to quantity a -or is 'leading' a by 90o. If the operator was -j, then it would be indicating that quantity bis acting at -90o to quantity a -or is 'lagging' a by 90o.Mathematicians use the letter 'i' to represent an imaginary number, but in electrical engineering we use the letter 'j'. This is because we already use a lower-case 'i'to represent an instantaneous value of current. In mathematics, the operator is sometimes written after the quantity to which it applies (i.e. 'bj'), but it is more usual, in engineering, to place the operator in front of that quantity (i.e. 'jb').The application of the operator 'j' to a phasor, then, acts to rotate that phasor, counterclockwise, through 90 degrees.The term, 'imaginary', is misleading -it doesn't mean that it exists only in the mind! It is simply a mathematician's term for 'quadrature', meaning 'lying along the y-axis'.A.C. quantities, such as current and voltage, can be resolved into horizontal and vertical components. So, we can represent an alternating-current quantity by a complex number which represents its in-phase component together with its quadrature (plus or minus 90o) component. For example, 3+j4 could represent a 5-A current, whose in-phase component is 3 A, and whose quadrature component is 4 A (i.e. which leads the in-phase component by 90o).Complex numbers enable complex a.c. circuits to be resolved relatively easily, and without the need to construct complicated phasor diagrams.As in-phase and quadrature ('imaginary') components only apply to a.c. quantities, we do not need to apply complex numbers to d.c.
What has the author John M Deur written?
John M. Deur has written: 'William Tell, 1984'
What has the author J Draper written?
J. Draper has written: 'The application of information theory to human operator problems'
Is vac and watt the same?
No, they are not the same. "Vac" refers to the voltage of an alternating current (AC) system, while "watt" refers to the power or energy consumption of a device. Voltage (Vac) measures the force that moves electric current, while watt measures the rate at which energy is consumed or produced.
What is the statement that stores the remainder of dividing the variable you by j in a variable named k?
k = you - int (you / j) * j; You can also use, if your language supports the modulus (%) operator... k = you % j;
C program to calculate x to the power y without using operator and standard function?
void main() { int x=100,y=3; //lets calculate x to the power of y now int result=0,i,j,a=x; for(i=0;i<(y-1);i++) { for(j=0;j<x;j++) result=result+a; a=result; result=0; } printf("%d",a); }
What is dfference between synchronization and asynchronization?
I believe you mean synchronous and asynchronous... as in calling a function synchronously or asynchronously. When you call a function synchronously, the program waits for the function to finish before continuing on... i = i + 1 DoSomething() j = j + 1 <---- j wouldn't be changed until DoSomething finished When you call a function asynchronously, the program spawns another thread to run the function and continues on without waiting for the function to finish... Thread t i = i + 1 t.Start ( DoSomething ) j = j + 1 <---- j be changed just after DoSomething started
Why current density is denoted by J?
Current density is denoted by J to indicate the amount of current flowing through a unit area in a given material. It is a vector quantity, representing the direction and magnitude of current flow in a specific direction. The letter J is commonly used as a symbol for current density in physics and engineering equations.
Who is the current owner of Target?
Target's current CEO is Robert J Ulrich
