Basic Qualification · B-005 Basic electronics and theory · B-005-009-010
If you wire two 20-microfarad capacitors in series, what is the capacity of the combination?
- A40 microfarads
- B80 microfarads
- C5 microfarads
- D10 microfarads
Correct answer: D — 10 microfarads. From the official ISED question bank, verified word for word.
Why
When you connect two identical capacitors in series, the total ability to store charge drops to half of one unit, so two 20-microfarad capacitors become a single 10-microfarad combination. 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