- #1
gimak
- 56
- 1
Homework Statement
Just problem 19C.
Homework Equations
P=IV=Ieiwt*Veiwt. T
The Attempt at a Solution
P = IVe2iwt=IVcos(2wt). What did I do wrong?
gimak said:Homework Statement
View attachment 205836
Just problem 19C.
=
Homework Equations
P=IV=Ieiwt*Veiwt. T
The Attempt at a Solution
P = IVe2iwt=IVcos(2wt). What did I do wrong?
ehild said:The complex form of power and voltage can be used for linear operations only (addition, multiplication with constant).
You can do linear operations with the complex voltages and currants, but in any other case, the real quantities should be used.gimak said:So this means that we can't use their complex form because whatever operators we use on them are only linear? Also, is another way to understand this is that since power & voltage are real, that means we must take their real part when doing operations with them?
Impedance is a measure of the opposition to the flow of alternating current (AC). It is a complex quantity that takes into account both the resistance and reactance of a circuit.
Resistance is a measure of the opposition to the flow of direct current (DC), while impedance takes into account both resistance and reactance and is used to measure the opposition to the flow of AC.
Reactance is the opposition to the flow of AC due to the capacitance or inductance of a circuit. It is measured in ohms and can be either capacitive or inductive.
Impedance is calculated using the formula Z = √(R² + X²), where R is the resistance and X is the reactance of a circuit. It is measured in ohms (Ω).
Impedance is important because it allows us to understand how a circuit responds to AC signals and can help us design and troubleshoot electrical systems. It is also necessary for calculating power and analyzing the performance of electronic devices.