what is AC voltmeter and DC voltmeter
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1
Hello everyone...
There are two different types of voltmeters..
PMMC (Permanent magnet moving coil ) type
MI (Moving iron) type.
PMMC type voltmeters are used to measure only DC voltage but MI Type voltmeters are used to measure both AC and DC voltages…
To measure only AC voltage the voltage measuring scale of the voltmeter is not calibrated by equally spaced…
But to measure the DC voltage the voltmeter should calibrate at equally spaced ..The reason behind it is we can measure the average AC voltage but the voltage rating are given in RMS value so we have to measure that root mean square value of the average voltage so it is not calibrated equally…
But in case of DC voltage ,it measure the peak value.. so it is numbering is done equi-spaced..
The DC voltmeter measure the DC voltage more accurately than the AC voltmeter measure the AC voltage…
The question says a lot. AC voltmeter measures AC voltages. DC voltmeter measures DC voltages.
What I said above is the simple version. Other than that:
The AC voltmeter measures the RMS value of the voltage that should be tested.
They are moving iron type.
The DC voltmeters measure the peak DC voltage. They are permanent magnet moving coil type.
You would not even get any reading if you measure the wrong voltage with the wrong voltmeter. The worst case scenario: You may fry up the coils inside the voltmeter.
Always be safe with electricity.
Hope this helps you...
There are two different types of voltmeters..
PMMC (Permanent magnet moving coil ) type
MI (Moving iron) type.
PMMC type voltmeters are used to measure only DC voltage but MI Type voltmeters are used to measure both AC and DC voltages…
To measure only AC voltage the voltage measuring scale of the voltmeter is not calibrated by equally spaced…
But to measure the DC voltage the voltmeter should calibrate at equally spaced ..The reason behind it is we can measure the average AC voltage but the voltage rating are given in RMS value so we have to measure that root mean square value of the average voltage so it is not calibrated equally…
But in case of DC voltage ,it measure the peak value.. so it is numbering is done equi-spaced..
The DC voltmeter measure the DC voltage more accurately than the AC voltmeter measure the AC voltage…
The question says a lot. AC voltmeter measures AC voltages. DC voltmeter measures DC voltages.
What I said above is the simple version. Other than that:
The AC voltmeter measures the RMS value of the voltage that should be tested.
They are moving iron type.
The DC voltmeters measure the peak DC voltage. They are permanent magnet moving coil type.
You would not even get any reading if you measure the wrong voltage with the wrong voltmeter. The worst case scenario: You may fry up the coils inside the voltmeter.
Always be safe with electricity.
Hope this helps you...
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3
a.c. -alternate current, which goes in different directions in one second
dc-direct Current,which goes in one direction like battery
dc-direct Current,which goes in one direction like battery
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