Question

what is the difference between ammeter and voltmeter give 5 point​

Answer 1

Answer:

What is Ammeter and Voltmeter?

Ammeter – It is an instrument which is used to measure the current in an electrical circuit. It gets its name from Ampere which is the unit of electric current.  

Voltmeter – This instrument measures the voltage between two points in an electrical circuit. It is present in both, digital and analogue form.  

What is the Difference Between Ammeter and Voltmeter?  

There are two ways to measure electricity  

Using current  

Using voltage  

Ammeter and voltmeter are used to measure the flow of current and the measure of voltage, respectively. The significant difference between these two devices lie in its use. Further, look at the table below to understand the difference between an ammeter and a voltmeter.  

Ammeter  

Voltmeter

Use

The flow of current is measured using this instrument.  

Voltage or potential between two points in an electric circuit is measured using this device.  

Connection

The electrical circuit element is connected in series with an ammeter.  

The electrical circuit element is connected in parallel mode with a voltmeter.  

In Terms of Resistance

The resistance of an ammeter is low so that it does not affect the flow of current in a circuit.  

Since it is used to measure the difference in potential between two points, voltmeters have high resistance.  

Accuracy of Ammeter and Voltmeter

It measures the flow of current accurately.  

It is less accurate with the measurement.

Range of Ammeter and Voltmeter  

It is not possible to decrease the range of an ammeter. However, it can be increased by connecting a shunt (or low resistance) in parallel with the Ammeter.  

A voltmeter can have a maximum range of 0-20 V. One can increase its range by connecting resistors in series with it, and it can be reduced by connecting resistors in parallel.  

Ideal Case  

An ideal Ammeter is supposed to have zero resistance, even though it is not practically possible.  

In an ideal voltmeter, the current is zero and resistance is infinite. Ideal resistance of voltmeter and ammeter is infinity and zero respectively.  

Representation

‘A’ denotes an ammeter.  

‘V’ is used to denote voltmeter.  

Explanation: