Some types of fuses used to protect electric meters have resistances of several ohms. Is this objectionable (a) in ammeter circuits and (b) in voltmeter circuits? Why?

Answer 1

Fuses are always connected in series
with the circuit. Therefore, its' resistance should be small compared to the resistance of the circuit.

The circuit of an Ammeter has a much
lower resistance than a Voltmeter. So
the fuse in the Ammeter has a higher
current rating. However, the fuse with the highest current rating has the lowest resistance.