Basic Qualification · B-005 Basic electronics and theory · B-005-009-006
A capacitor is made of two identical metal plates separated by air. What parameters determine its capacitance?
- A Surface area of the plates and applied voltage
- B Surface area of the plates and spacing between the plates
- C Operating frequency and spacing between the plates
- D Type of metal and spacing between the plates
Correct answer: B — Surface area of the plates and spacing between the plates. From the official ISED question bank, verified word for word.
Why
Capacitance grows when the metal plates have more surface area to store charge, and it shrinks when the gap between them gets wider, because the electric field weakens with distance. 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.