Tech moves fast! Stay ahead of the curve with Techopedia!
Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.
Impedance (Z), in electrical devices, refers to the amount of opposition faced by direct or alternating current when it passes through a conductor component, circuit or system. Impedance is null when current and voltage are constant and thus its value is never zero or null in the case of alternating current.
Impedance is often mistakenly said to be the same as resistance, which is not correct. Impedance is a two-dimensional quantity comprising resistance (real component vector) and reactance (imaginary component vector). Impedance is also known as the frequency domain ratio of voltage and current. Frequency is involved because of alternating current (AC) whose sinusoidal wave is generated upon a certain frequency which directly or indirectly affects electrical components such as capacitors and inductors, whose resistance varies with frequency of the power source provided.
Do you work in the tech industry? Help us learn more about why the gender gap still exists in tech by taking this quick survey! Survey respondents will also be entered to win a $100 Amazon Gift Card!