Question

Ammeter often contains fuses that protect them from large current while voltmeter seldom?

Answer 1

Ammeter is a device used to measure current flowing through the component and is connected in series with it. In case, if the ammeter is connected in parallel, it tends to draw huge current and cause damage. In order to maintain safety, ammeter has in-built fuse.

Voltmeter is device used to measure the potential difference i.e. voltage across two points. It has internal resistor whose resistance is very high. So there is no need for fuses. This high resistance limits the current flowing through it. Another purpose of high internal resistance in the design is that, there will be negligible voltage drop inside voltmeter and it will show correct reading.