Assertion: ac voltmeter | /r/CapableOf | use rectifier
Facets:
value: before the multistage amplifier
type: TEMPORAL
value: before amplifying the signal
type: TEMPORAL
Source sentences:
text: AC voltmeter uses a rectifier before amplifying the signal so that the AC signal can be converted into DC and then this DC is passed to the moving coil magnet meter to vary the indication of the pointer and thereby measuring the RMS value of AC voltage.
text: Another key difference between DC voltmeter and AC voltmeter is that a DC voltmeter does not use rectifier before multistage amplifier while AC voltmeter uses rectifier before the multistage amplifier.