E. M. D. P.
Abbreviation for "electro-motive difference of potential" or for
electro-motive force producing a current as distinguished from mere
inert potential difference.
E. M. F.
Abbreviation for "electro-motive force."
Fig. 164. END-ON METHOD.
End-on Method.
A method of determining the magnetic moment of a magnet. The magnet
under examination, N S, is placed at right angles to the magnetic
meridian, M O R, and pointing directly at or "end on" to the centre of a
compass needle, n s. From the deflection a of the latter the moment is
calculated.
Endosmose, Electric.
The inflowing current of electric osmose. (See Osmose, Electric.)
End Play.
The power to move horizontally in its bearings sometimes given to
armature shafts. This secures a more even wearing of the commutator
faces. End play is not permissible in disc armatures, as the attraction
of the field upon the face of the armature core would displace it
endwise. For such armatures thrust-bearings preventing end play have to
be provided.
Energy.
The capacity for doing work. It is measured by work units which involve
the exercise of force along a path of some length. A foot-pound,
centimeter-gram, and centimeter-dyne are units of energy and work.
The absolute unit of energy is the erg, a force of one dyne exercised
over one centimeter of space. (See Dyne.)
The dimensions of energy are
force (M * L / T^2) * space (L) = M * (L^2 / T^2).
Energy may be chemical (atomic or molecular), mechanical,
electrical, thermal, physical, potential, kinetic, or actual, and other
divisions could be formulated.