VALVE, FLEMING.--See Fleming Valve.
VARIABLE CONDENSER.--See Condenser, Variable.
VARIABLE INDUCTANCE.--See Inductance, Variable.
VARIABLE RESISTANCE.--See Resistance, Variable.
VARIOCOUPLER.--A tuning device for varying the inductance of the receiving oscillation circuits. It consists of a fixed and a rotatable coil whose windings are not connected with each other.
VARIOMETER.--A tuning device for varying the inductance of the receiving oscillation currents. It consists of a fixed and a rotatable coil with the coils connected in series.
VERNIER CONDENSER.--See Condenser, Vernier.
VOLT.--The electromotive force which produces a current of 1 ampere when steadily applied to a conductor the resistance of which is one ohm.
VOLTAGE DIVIDER.--See Potentiometer.
VOLTAGE, PLATE.--The voltage of the current that is used to energize the plate of a vacuum tube.