I've learned that a vector in coordinate system can be expressed as follows:
A = axAx+ayAy+azAz.
ai, i = x, y, z, are the base vectors.
The transformation matrix from cylindrical coordinates to cartesian coordiantes is:
Ax cosΦ -sinΦ 0 Ar
Ay = sinΦ cosΦ...
If the teriminals are left open, the current flowing through the resistor is Ix, and for the dependent source it is 0.5Ix. However, since they are in series, the current should be the same.
Hence Ix = 0 ? There is no current flowing through the loop? And the voltage between terminal a and b...
Homework Statement
Draw the Thevenin and Norton equivalent circuits for diagram 1, labeling the elements and terminals.
ZR = 5 Ω, ZL = j5Ω, Vs = 3∠30°, the current flowing throught the resistance is Ix, and the current flowing through the dependent current source is 0.5Ix.
Homework...
Homework Statement
Compute i1 and i2 in Figure a). R3 = R4 = 6Ω, and R5 = R6 = 12Ω.
Homework Equations
KVL and KCL
The Attempt at a Solution
Since R3 / R5 = R4 / R6 , it's a Wheastone Bridge and i2 = 0, and i1 = \frac{20}{9} A.
But my question is, why circuit in Figure b) is not...
Homework Statement
Actually this is not from homework. It occurs in my brain this afternoon.
Is it possible to derive the analytic expression of a function by its Taylor series expansion?
For example, given the following expansion, how to derive the analytic expression of it?
f(x) =...
Sorry for grammar mistakes.
1) I can easily tell that the magnitude of that power is 10 W, but should it be negative or positive? I can't tell the polarity of the voltage dropped across the resistor. That's why I am asking.
2) I don't know. Do you mean electric potential by voltage?
1)By Ohm's law, the voltage drop across the resitor is 10 V? How can I know the polarity of that voltage?
2)Is it just 10 V? I am not sure. But by the definition of an independent voltage source, it should be 10 V.
so can we tell that the power of the current source, the resitor and the voltage source are respectively -20W, 0W and 20W since the resitor just give out what it absorb from the current source?
Homework Statement
Concider the circuit shown below. Find the current iR flowing through the resitor. Find the power for each element in the circuit. Which elements are absorbing power?Homework Equations
Ohm's law: U = IR;
Kirchhoff's Current Law and Kirchhof's Voltage Law.The Attempt at a...