Basic Qualification · B-005 Basic electronics and theory · B-005-002-011
Which term describes the direction of current in a DC circuit?
- A Polarity
- B Polarization
- C Directivity
- D Phase
Correct answer: A — Polarity. From the official ISED question bank, verified word for word.
Why
Polarity describes which end of a battery or power source is positive and which is negative, defining the fixed direction that direct current flows in a circuit. 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.