DC And AC voltmeter and ammeter.

Content

             AC and DC voltmeters are electronic devices used to measure voltage in electrical circuits. They differ in their ability to measure either alternating current (AC) or direct current (DC) voltages. Here's a brief explanation of each type:

 DC voltmeter and ac voltmeter DC voltmeter measure the peak value of DC voltage. AC voltmeter measure the RMS value of AC voltage. The DC voltmeter consists of tender followed by a multistage amplifier and a PMMC metre.

AC and DC voltmeter

The instrument which is used to measure the AC voltage across any two points of electric circuit is called AC voltmeter. The aisi v m consists of reactive fire then it is said to be rectifier based AC voltmeter. The DC voltmeter measure only DC voltage.

DC voltmeter.

The series resistance which is used in DC voltmeter is also called series multiplier resistance or simple array multiple. 8 basically limit amount of current that flow through galvanometer in order to prevent the m current from exceeding the full scale deflection value. The circuit diagram of DC voltmeter in show in below figure.

DC voltmeter diagram.

We have to play this DC voltmeter across the two point of an electric circuit, where the DC voltage is to be measured.A DC voltmeter is used to measure the magnitude of direct current voltage, which flows continuously in a single direction without changing polarity. DC voltage is commonly found in batteries, electronic circuits powered by batteries, and some power supplies. DC voltmeters provide readings of the average or steady-state voltage value. They are calibrated to measure DC voltage accurately.

AC voltmeter.

If half wave rectifier is connected a head of DC voltmeter, then that enter combination together is called AC voltmeter using half wave rectifier. The block diagram of AC voltmeter using half wave rectifier is show in below figure.An AC voltmeter is designed to measure the magnitude and sometimes the frequency of alternating current voltage. AC voltage periodically changes in direction and magnitude over time, as found in power distribution systems, home appliances, and electronic devices that operate on AC power. AC voltmeters typically have a scale that displays the root mean square (RMS) voltage value, which represents the effective voltage. They are calibrated to provide accurate measurements of AC voltage.

The RMS value of sinusoidal AC input voltage single phase.

It's important to note that some voltmeters are designed to measure both AC and DC voltage and are referred to as AC/DC voltmeters or multimeters. These versatile instruments allow users to switch between AC and DC voltage measurement modes, making them suitable for a wide range of applications. Multimeters often include additional measurement functions, such as current and resistance measurements, continuity testing, and diode testing.

When using a voltmeter, it is crucial to select the appropriate voltage range based on the expected voltage level to ensure accurate readings and prevent damage to the instrument. Additionally, proper connection to the circuit or device being measured is essential, following the manufacturer's instructions or guidelines for safety and accurate measurements.

AC and DC Ammeter.

DC ammeter

                     Current is the rate of flow of electric charge is this electric charge flow only in one direction then the resultant current is called direct current (DC). The instrument which is used to measure the direct current is called DC ammeter.

DC Ammeter

AC Ammeter.

                         Current is the rate of flow of electric charge if the direction of this electric charge change regularly then the resultant current is called alternating current AC.

                     The instrument which is used to measure the alternating current that flow through only branch of electric circuit is called AC ammeter.

AC Ammeter