Difficulty: Easy
Correct Answer: OHMS
Explanation:
Introduction / Context:
A fuse is a passive component intended to be either continuous (very low resistance) or open (infinite resistance). Selecting the proper multimeter function ensures a quick and safe continuity check without powering the circuit under test.
Given Data / Assumptions:
Concept / Approach:
Continuity is determined using the resistance (ohms) function. A good fuse measures near 0 ohms (or beeps in continuity mode). Using AC or DC voltage ranges does not reveal continuity in an unpowered fuse. Current (amps) mode is dangerous if placed across a component because it effectively shorts the meter leads through the meter shunt.
Step-by-Step Solution:
Verification / Alternative check:
Use continuity tone if available; a steady tone indicates a good fuse. Visual inspection for a broken element can support the measurement but is not definitive.
Why Other Options Are Wrong:
AC and DC ranges read voltages, not continuity. AMPS range risks meter damage and blown meter fuse.
Common Pitfalls:
Testing in-circuit can produce misleading parallel paths; remove power and isolate the fuse when possible.
Final Answer:
OHMS
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