Impedance, represented by the symbol , is a measure of the opposition to electrical flow. It is measured in ohms .
- Impedance by the Organic Chemistry Tutor
Difference between Resistance and Impedance?
Resistance is measured for DC circuits. Impedance is a more complex concept that includes resistance, but also the Reactance.
I saw this Khan academy video where they use this formula, which is the norm of Impedance.
Impedance of Resistance
Impedance of Inductance
Impedance of Capacitance
Combinations of Impedance
These follow the same formula as for Resistor, but they are in terms of complex impedances instead of real resistance.
For series impedances, the formula is
For parallel impedances, the formula is