Basic hardware diagnostics: When testing a typical small computer speaker with an ohmmeter, what resistance (in ohms) should you expect to read?

Introduction / Context:
PC case speakers and many small speakers used for basic beeps are rated by their nominal impedance. Measuring with an ohmmeter provides an approximate check for open or shorted coils during quick diagnostics.

Given Data / Assumptions:

• We are checking a small speaker typical of PC enclosures.
• Common nominal impedances are 4 Ω, 8 Ω, or 16 Ω.
• An ohmmeter reading near the nominal impedance indicates a healthy voice coil.

Concept / Approach:
A proper speaker shows a finite, low resistance corresponding roughly to its impedance rating (DC resistance is usually slightly lower than the rated AC impedance). Zero ohms indicates a shorted coil. Infinity (unlimited) indicates an open coil. Negative resistance is physically meaningless in this context. Of the options given, 16 Ω is the realistic healthy reading for a 16-ohm speaker and represents the only plausible choice.

Step-by-Step Solution:

Verification / Alternative check:
Brief audio test or continuity tone confirms the coil is intact; visual inspection can reveal burned windings.

Why Other Options Are Wrong:
0 Ω indicates a short; unlimited Ω indicates an open; negative values are not valid with a passive resistor-like device.

Common Pitfalls:
Measuring in-circuit (parallel paths change the reading) or using the wrong meter range.

Final Answer:
16 Ohms