Basic Qualification · B-005 Basic electronics and theory · B-005-004-003
How is the resistance in a DC circuit calculated when the voltage and current are known?
- Acurrent
- BResistance equals power divided by voltage
- CResistance equals current divided by voltage
- DResistance equals voltage divided by current
Correct answer: D — Resistance equals voltage divided by current. From the official ISED question bank, verified word for word.
Why
To find resistance when you know voltage and current, you simply divide the voltage by the current. 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