Voltmeter
Voltmeter is an instrument that
measures voltages of either direct or alternating
electric current on a scale usually graduated in volts,
millivolts -0.001 volt, or kilovolts 1,000 volts.
It is an electronic instrument for the
measurement of the electric potential difference between
two conductors
An ideal voltmeter has infinite resistance: It is an
open circuit. Actually it is very difficult to make a
physical voltmeter with infinite resistance, therefore a
well designed voltmeter exhibits a very large internal
input resistance
Analog voltmeter consists of a
sensitive
galvanometer (current meter) in series with
a high resistance
Digital voltmeter shows voltage
directly as numerals
HOW TO MAKE AN AMMETER
