Basic Qualification · B-005 Basic electronics and theory · B-005-012-002
At resonance, what impedance does a parallel tuned circuit exhibit?
- A High impedance
- B Low impedance
- C Impedance equal to reactance of the circuit
- D Impedance equal to resistance of the circuit
Correct answer: A — High impedance. From the official ISED question bank, verified word for word.
Why
At resonance, a parallel tuned circuit acts like a roadblock to the flow of alternating current, resulting in high impedance. The full explanation — and one for every question — is in Pro.
Practise this section
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.