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- Electrical_impedance abstract "Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied. In quantitative terms, it is the complex ratio of the voltage to the current in an alternating current (AC) circuit. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude. When a circuit is driven with direct current (DC), there is no distinction between impedance and resistance; the latter can be thought of as impedance with zero phase angle.It is necessary to introduce the concept of impedance in AC circuits because there are two additional impeding mechanisms to be taken into account besides the normal resistance of DC circuits: the induction of voltages in conductors self-induced by the magnetic fields of currents (inductance), and the electrostatic storage of charge induced by voltages between conductors (capacitance). The impedance caused by these two effects is collectively referred to as reactance and forms the imaginary part of complex impedance whereas resistance forms the real part.The symbol for impedance is usually Z and it may be represented by writing its magnitude and phase in the form |Z|∠θ. However, cartesian complex number representation is often more powerful for circuit analysis purposes. The term impedance was coined by Oliver Heaviside in July 1886. Arthur Kennelly was the first to represent impedance with complex numbers in 1893.Impedance is defined as the frequency domain ratio of the voltage to the current. In other words, it is the voltage–current ratio for a single complex exponential at a particular frequency ω. In general, impedance will be a complex number, with the same units as resistance, for which the SI unit is the ohm (Ω). For a sinusoidal current or voltage input, the polar form of the complex impedance relates the amplitude and phase of the voltage and current. In particular, The magnitude of the complex impedance is the ratio of the voltage amplitude to the current amplitude. The phase of the complex impedance is the phase shift by which the current lags the voltage.The reciprocal of impedance is admittance (i.e., admittance is the current-to-voltage ratio, and it conventionally carries units of siemens, formerly called mhos).".
- Electrical_impedance thumbnail Complex_Impedance.svg?width=300.
- Electrical_impedance wikiPageExternalLink imped.html.
- Electrical_impedance wikiPageExternalLink impedance.php.
- Electrical_impedance wikiPageExternalLink circuits_sys_review.pdf.
- Electrical_impedance wikiPageID "41957".
- Electrical_impedance wikiPageLength "29600".
- Electrical_impedance wikiPageOutDegree "111".
- Electrical_impedance wikiPageRevisionID "683882608".
- Electrical_impedance wikiPageWikiLink Admittance.
- Electrical_impedance wikiPageWikiLink Alternating_current.
- Electrical_impedance wikiPageWikiLink Ampere.
- Electrical_impedance wikiPageWikiLink Arthur_E._Kennelly.
- Electrical_impedance wikiPageWikiLink Arthur_Kennelly.
- Electrical_impedance wikiPageWikiLink Bandwidth_(signal_processing).
- Electrical_impedance wikiPageWikiLink Bioelectrical_impedance_analysis.
- Electrical_impedance wikiPageWikiLink Capacitance.
- Electrical_impedance wikiPageWikiLink Capacitor.
- Electrical_impedance wikiPageWikiLink Cartesian_coordinate_system.
- Electrical_impedance wikiPageWikiLink Cartesian_plane.
- Electrical_impedance wikiPageWikiLink Category:Antennas_(radio).
- Electrical_impedance wikiPageWikiLink Category:Electrical_resistance_and_conductance.
- Electrical_impedance wikiPageWikiLink Category:Electronics.
- Electrical_impedance wikiPageWikiLink Category:Physical_quantities.
- Electrical_impedance wikiPageWikiLink Characteristic_impedance.
- Electrical_impedance wikiPageWikiLink Complex_exponential.
- Electrical_impedance wikiPageWikiLink Complex_frequency.
- Electrical_impedance wikiPageWikiLink Complex_number.
- Electrical_impedance wikiPageWikiLink Current_divider.
- Electrical_impedance wikiPageWikiLink Dielectric.
- Electrical_impedance wikiPageWikiLink Dimensional_analysis.
- Electrical_impedance wikiPageWikiLink Direct_current.
- Electrical_impedance wikiPageWikiLink Electric_charge.
- Electrical_impedance wikiPageWikiLink Electric_current.
- Electrical_impedance wikiPageWikiLink Electric_field.
- Electrical_impedance wikiPageWikiLink Electrical_characteristics_of_dynamic_loudspeakers.
- Electrical_impedance wikiPageWikiLink Electrical_charge.
- Electrical_impedance wikiPageWikiLink Electrical_circuit.
- Electrical_impedance wikiPageWikiLink Electrical_conduction.
- Electrical_impedance wikiPageWikiLink Electrical_current.
- Electrical_impedance wikiPageWikiLink Electrical_impedance.
- Electrical_impedance wikiPageWikiLink Electrical_insulation.
- Electrical_impedance wikiPageWikiLink Electrical_network.
- Electrical_impedance wikiPageWikiLink Electrical_reactance.
- Electrical_impedance wikiPageWikiLink Electrical_resistance.
- Electrical_impedance wikiPageWikiLink Electrical_resistance_and_conductance.
- Electrical_impedance wikiPageWikiLink Electrical_resistivity_and_conductivity.
- Electrical_impedance wikiPageWikiLink Electromotive_force.
- Electrical_impedance wikiPageWikiLink Equivalent_impedance_transforms.
- Electrical_impedance wikiPageWikiLink Eulers_formula.
- Electrical_impedance wikiPageWikiLink Faradays_law_of_induction.
- Electrical_impedance wikiPageWikiLink Fourier_analysis.
- Electrical_impedance wikiPageWikiLink Frequency.
- Electrical_impedance wikiPageWikiLink Frequency_domain.
- Electrical_impedance wikiPageWikiLink Frequency_response.
- Electrical_impedance wikiPageWikiLink High_impedance.
- Electrical_impedance wikiPageWikiLink Imaginary_number.
- Electrical_impedance wikiPageWikiLink Imaginary_part.
- Electrical_impedance wikiPageWikiLink Imaginary_unit.
- Electrical_impedance wikiPageWikiLink Immittance.
- Electrical_impedance wikiPageWikiLink Impedance_bridging.
- Electrical_impedance wikiPageWikiLink Impedance_cardiography.
- Electrical_impedance wikiPageWikiLink Impedance_control.
- Electrical_impedance wikiPageWikiLink Impedance_matching.
- Electrical_impedance wikiPageWikiLink In-phase_and_quadrature_components.
- Electrical_impedance wikiPageWikiLink Inductance.
- Electrical_impedance wikiPageWikiLink Inductor.
- Electrical_impedance wikiPageWikiLink Insulator_(electricity).
- Electrical_impedance wikiPageWikiLink International_System_of_Units.
- Electrical_impedance wikiPageWikiLink Inversely_proportional.
- Electrical_impedance wikiPageWikiLink LTI_system_theory.
- Electrical_impedance wikiPageWikiLink Laplace_transform.
- Electrical_impedance wikiPageWikiLink Magnetic_field.
- Electrical_impedance wikiPageWikiLink Magnetic_flux_density.
- Electrical_impedance wikiPageWikiLink Mho.
- Electrical_impedance wikiPageWikiLink Multiplicative_inverse.
- Electrical_impedance wikiPageWikiLink Negative_impedance_converter.
- Electrical_impedance wikiPageWikiLink Nortons_theorem.
- Electrical_impedance wikiPageWikiLink Ohm.
- Electrical_impedance wikiPageWikiLink Ohms_law.
- Electrical_impedance wikiPageWikiLink Oliver_Heaviside.
- Electrical_impedance wikiPageWikiLink Phase_(waves).
- Electrical_impedance wikiPageWikiLink Phase_angle.
- Electrical_impedance wikiPageWikiLink Phase_factor.
- Electrical_impedance wikiPageWikiLink Phase_shift.
- Electrical_impedance wikiPageWikiLink Polar_coordinate_system.
- Electrical_impedance wikiPageWikiLink Polar_coordinates.
- Electrical_impedance wikiPageWikiLink Polar_form.
- Electrical_impedance wikiPageWikiLink Potential.
- Electrical_impedance wikiPageWikiLink Proportionality_(mathematics).
- Electrical_impedance wikiPageWikiLink Quadrature_phase.
- Electrical_impedance wikiPageWikiLink Ratio.
- Electrical_impedance wikiPageWikiLink Reactance_(electronics).
- Electrical_impedance wikiPageWikiLink Real_number.
- Electrical_impedance wikiPageWikiLink Real_part.
- Electrical_impedance wikiPageWikiLink Resistance_distance.
- Electrical_impedance wikiPageWikiLink Resistivity.
- Electrical_impedance wikiPageWikiLink Resistor.
- Electrical_impedance wikiPageWikiLink SI_unit.
- Electrical_impedance wikiPageWikiLink S_plane.