Practice question · Multiple choice
A multimeter set to measure current has near-zero internal resistance. What happens if you connect it directly across a battery’s terminals (as if measuring voltage)?
Hints
- Ohm’s law with : what does do?
- Ammeters go in series (current flows through them); voltmeters go in parallel. Swapping the roles swaps the safety.
Show the answer
B. A dangerous short circuit through the meter
Why
An ammeter is deliberately a near-perfect conductor so it won’t disturb the current it measures, placed across a source, it becomes the circuit, and with tiny means a blown fuse at best. Knowing why the rule exists is what makes it stick.
Practise Laboratory Safety and Equipment
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