Basic Qualification · B-005 Basic electronics and theory · B-005-003-007
Which of the following two quantities should be multiplied together to find power?
- A Voltage and current
- B Inductance and capacitance
- C Voltage and inductance
- D Resistance and capacitance
Correct answer: A — Voltage and current. From the official ISED question bank, verified word for word.
Why
Power measures how fast electrical energy is used, and you find it by multiplying voltage, which is the electrical pressure, by current, which is the flow of electrons. 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.