Question

What is the range of voltmeter?

Answer 1

Hint:The range is set up according to the meter's intended function. When a particular amount of current runs through the voltmeter, it is designed to give full scale deflection. The voltmeter's range is determined by a series connected resistor, and the scale is indicated accordingly. Similarly, the current range of a parallel connected shunt will be determined.

Complete answer:
It measures voltages on a scale usually graduated in volts, millivolts \[\left( {0.001{\text{ }}volt} \right)\] , or kilovolts\[\left( {1,000{\text{ }}volts} \right)\] . The voltmeters utilized in the school laboratory have a maximum range of \[\left( {0-20} \right){\text{ }}V\] while the practical voltmeter ranges between \[1000\] to \[3000{\text{ }}volts\] .

Additional Information: Many voltmeters are digital, with numerical displays for readings. The instruments described above can also offer analogue readings by moving a pointer on a scale to indicate voltage, however digital voltmeters are generally more accurate than analogue instruments. The electrostatic voltmeter, which employs electrostatic forces to detect voltage directly rather than through the action of current, is one of the several types of voltmeters.

To measure alternating- or direct-current voltages, the electronic voltmeter employs amplification or rectification (or both). This sort of instrument does not produce circuit loading errors since the current required to trigger the metre movement is not drawn from the circuit being monitored.

Note:The range of the voltmeter can be increased or decreased. Both approaches are explained below:
-A voltmeter's range can be expanded by connecting a series of suitable high resistors to it.
-A voltmeter's range can be reduced by lowering its resistance. This can be accomplished by connecting an appropriate resistance to the voltmeter.