What is the other name of DC Meter ? Explain the role of DC Meter in Control panel ?
Answers
Explanation:
DC voltmeter is a measuring instrument, which is used to measure the DC voltage across any two points of electric circuit. If we place a resistor in series with the Permanent Magnet Moving Coil (PMMC) galvanometer, then the entire combination together acts as DC voltmeter.
The series resistance, which is used in DC voltmeter is also called series multiplier resistance or simply, multiplier. It basically limits the amount of current that flows through galvanometer in order to prevent the meter current from exceeding the full scale deflection value. The circuit diagram of DC voltmeter is shown in below figure.
Circuit Diagram Of DC voltmeter
We have to place this DC voltmeter across the two points of an electric circuit, where the DC voltage is to be measured.