Basic Qualification · B-005 Basic electronics and theory · B-005-010-004
What is the term for the opposition to alternating current caused by the combined effect of reactance and resistance?
- AImpedance
- BReluctance
- CAdmittance
- DConductance
Correct answer: A — Impedance. From the official ISED question bank, verified word for word.
Why
Impedance is the total opposition a circuit offers to alternating current, combining both resistance and reactance into one value. The full explanation — and one for every question — is in Pro.
Practise this section
Basic electronics and theory is section B-005 of the Basic exam: The theory: Ohm's law, power, series and parallel circuits, AC and DC, frequency and wavelength, decibels, and the metric prefixes the exam leans on.
Drill B-005 — free, no account