Question

What are the advantages of Digital Voltmeter?

Answer 1

Hint: Electronic voltmeter abbreviated as DVM is an instrument wont to measure the electrical potential between two points during a circuit. The voltage might be an AC (AC) or DC (DC).

Complete answer:
An electronic voltmeter (DVM) measures an unknown input voltage by converting the voltage to a digital value then displays the voltage in numeric form. DVMs are usually designed around a special sort of digitizer called an integrating converter
Advantages of electronic voltmeter:
• Digital display of the output eliminates human reading errors.
• Readings are accurate and fast compared to analog meters.
• Digital Voltmeter is more stable and reliable.
• Smaller in size and cost-effective.
• DVM can measure both AC and DC voltages.
Principle of voltmeter:
The main principle of voltmeter is that it must be connected in parallel during which we would like to live the voltage. Parallel connection is employed because a voltmeter is made in such a way that it's a really high value of resistance. So if that prime resistance is connected serial then the present flow is going to be almost zero which suggests the circuit has become open.
If it's connected in parallel, then the load impedance comes parallel with the high resistance of the voltmeter and hence the mixture will give almost an equivalent of the impedance that the load had. Also in the shunt circuit we all know that the voltage is the same therefore the voltage between the voltmeter and therefore the load is nearly same and hence voltmeter measures the voltage.
For a perfect voltmeter, the resistance is to be infinity and hence the present drawn to be zero so there'll be no power loss within the instrument. But this is often not achievable practically as we cannot have a cloth which has infinite resistance

Note: A voltmeter is an instrument used for measuring electrical electric potential between two points in an electrical circuit. An ammeter may be a measuring instrument wont to measure the electrical current during a circuit.