Basic Qualification · B-005 Basic electronics and theory · B-005-003-009
A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much:
- A resistance
- B current
- C power
- D voltage
Correct answer: C — power. From the official ISED question bank, verified word for word.
Why
A resistor gets hot and burns because it is turning electrical energy into heat faster than it can cool down, which is exactly what dissipating too much power means. 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.