Noun:

வோல்டாமீட்டரால்,

voltmeter தமிழ் அர்த்தத்தின் உதாரணம்:

None

voltmeter's Usage Examples:

His ampere-balances, voltmeters and electrometers, and double bridge, are elsewhere described in detail (see Amperemeter; Electrometer, and Wheatstone'S Bridge).

In the Hartmann and Braun form of hot-wire voltmeter, the fine wire is fixed between two supports, and the expansion produced when a current is passed through it causes the wire to sag down, the sag being multiplied by a gear and made to move an indicating needle over a scale.

There are methods of measuring electrical power by means of electrostatic voltmeters, or of quadrant electrometers adapted for the purpose, which when so employed may be called electrostatic wattmeters.

In the same manner the potentiometer may be used to calibrate a voltmeter by the aid of a divided resistance of known value.

This last point is important in connexion with voltmeters used on the switchboards of electric generating stations, where relatively strong electric or magnetic fields may be present, due to strong currents passing through conductors near or on the board.

Electrostatic voltmeters are based on the principle that when two conductors are at different potentials they attract one another with a force which varies as the square of the potential difference (P.

For the measurement of voltages in continuous current generating stations, movable coil voltmeters are much employed, generally constructed then in the "edgewise" pattern (fig.

The voltmeter needle may then be made to record its variations graphically on a drum covered with paper and so to delineate the wave form of the current.

In that known as the Cardew voltmeter, a fine platinum-silver wire, having a resistance of about 300 ohms, is stretched in a tube or upon a frame contained in a tube.

A high-resistance electrodynamometer may be employed as a voltmeter.

Electromagnetic voltmeters may therefore be thermal, electromagnetic or electrodynamic.

Numerous forms of hot-wire or thermal voltmeter have been devised.

Synonyms:

meter, millivoltmeter, electronic voltmeter,

Antonyms:

None