Rigidity, Molecular
The tendency of molecules to resist rotation or change of position; the assumed cause of magnetic coercive force, or retentivity.
The tendency of molecules to resist rotation or change of position; the assumed cause of magnetic coercive force, or retentivity.
In a mariners’ compass, the thirty-two points, designated, north, north by east, north north east, etc. (See Compass Mariner’s-Compass, Points of the.)
A petroleum product; a hydrocarbon of low boiling point. Its vapor is used in flashing (q. v.) carbon filaments for incandescent lamps.
A pole changer, current reverser, or commutator, g., such as the commutator of an induction coil. (Obsolete.)
An automatic circuit breaker, one which rapidly opens and closes a circuit, as in the case of the primary of an induction coil an interrupter. (Obsolete.)
This apparatus consists of two cylinders, one, A, made of brass, the other, B, of wood, with a spiral groove. At its end is a copper ring a. A fine brass wire has one end attached to this ring. Its other end is fastened at e, and it is wound as shown; n and o [...]
An apparatus for increasing potential difference. It consists of a number of static condensers. They are charged in multiple arc or in parallel, and are discharged in series. Secondary batteries may be used for the charging; thus a static effect is produced from a galvanic battery.
The third arm of known resistance in a Wheatstone bridge. (See Proportionate Arms.)
An adjustable resistance; an apparatus for changing the resistance without opening the circuit. Its action may depend on the introduction of variable lengths of mercury column, of some other liquid, or of wire into a circuit. (See Rheostat, Wheatstone’s.)
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