BOOSTER BATTERY.--See Battery, Booster.
BROADCASTING.--Sending out intelligence and music from a central station for the benefit of all who live within range of it and who have receiving sets.
CAPACITANCE.--Also called by the older name of capacity. The capacity of a condenser, inductance coil or other device capable of retaining a charge of electricity. Capacitance is measured in terms of the microfarad.
CAPACITIVE COUPLING.--See Coupling, Capacitive.
CAPACITY.--Any object that will retain a charge of electricity; hence an aerial wire, a condenser or a metal plate is sometimes called a capacity.
CAPACITY, AERIAL.--The amount to which an aerial wire system can be charged. The capacitance of a small amateur aerial is from 0.0002 to 0.0005 microfarad.
CAPACITY, DISTRIBUTED.--A coil of wire not only has inductance, but also a certain small capacitance. Coils wound with their turns parallel and having a number of layers have a bunched capacitance which produces untoward effects in oscillation circuits. In honeycomb and other stagger wound coils the capacitance is more evenly distributed.
CAPACITY REACTANCE.--See Reactance, Capacity.
CAPACITY UNIT.--See Farad.
CARBON RHEOSTATS.--See Rheostat, Carbon.