Electricity - Basic Navy Training Courses
Here is the "Electricity - Basic Navy Training Courses" (NAVPERS 10622) in its
entirety. It should provide one of the Internet's best resources for people
seeking a basic electricity course - complete with examples worked out. See
Table of Contents.
¶ U.S. GOVERNMENT PRINTING OFFICE; 1945 - 618779
APPENDIX TABLE I
- AGONIC: An imaginary line of the earth's surface passing through points where the magnetic declination is
0°, that is, points where the compass points true north.
- ALTERNATOR: An alternating current generator. AMMETER: The instrument for the measurement of current.
- AMPERE: The unit of electrical current.
- AMPERE-HOUR: The quantity of electricity equivalent to a current of one ampere flowing past a point in a
conductor in one hour.
- AMPERE-TURN: The magnetizing force produced by a current of one ampere flowing through a coil of one turn.
- ANODE: The electrode in a cell (voltaic or electrolytic) that attracts the negative ions and repels the
positive; the positive pole.
- ARC: The luminous glow between incandescent electrodes.
- ARMATURE: The movable part of a motor or the removable part of a magnetic circuit, such as the iron placed
across the poles of a horseshoe magnet.
- AUTO-TRANSFORMER: A transformer in which the primary and secondary are connected together in one winding.
- BATTERY: A. group of several cells connected together as a unit.
- BRANCH CIRCUIT: One of the conductors in a parallel circuit.
- BRUSH: The conducting material, usually a block of carbon, bearing against the commutator or slip-rings
through which the current flows in or out.
- CATHODE: The electrode in a cell (voltaic or primary) that attracts the positive ions and repels the
negative ions; the negative pole.
- CHOKE COIL: A coil of low ohmic resistance and comparatively high impedance to alternating current.
- -CIRCUIT: The complete path of an electric current including, usually, the generating device.
- CIRCUIT BREAKER: A device that opens a circuit while it is carrying current; often used in abnormal
conditions, such as overloads.
- CIRCULAR MIL: An area equal to that of a circle with a diameter of 0.001 inch. It is used for measuring the
cross section of wires.
- COMMUTATOR: That part of the armature of a dynamo which converts an alternating into a direct current.
- CONDENSER: A device consisting of two or more conductors separated by non-conductor material; it holds or
stores an electric charge.
- CONDUCTANCE: The reciprocal of electrical resistance. Conducting power.
- CONDUCTIVITY: The ease with which a substance transmits electricity.
- CONDUCTOR: A material capable of transmitting electric current.
- CONVERTER, ROTARY: An electrical machine having a commutator at one end and slip-rings at the other end of
the armature. It is used for the conversion of alternating to direct current.
- CORE: A mass of iron placed inside a coil to increase its magnetism.
- COULOMB: The-unit of static electricity; the quantity of electricity transferred by one ampere in one
- COUNTER EMF: Counter electromotive force; an EMF induced in a coil or armature that opposes the applied
- CURRENT OF ELECTRICITY: The continuous flow of electrons in a circuit.
- D'ARSONVAL GALVANOMETER: A galvanometer in which a moving coil swings between the poles of a permanent
- DEMAGNETIZE: To deprive a body of its magnetic properties.
- DIELECTRIC: A non-conducting material.
- DIODE: A vacuum tube containing the filament and the plate; it serves as a rectifier of alternating current.
- DIP NEEDLE: A magnetized needle capable of rotation in a vertical plane.
- DIRECT CURRENT: An electric current that flows in one direction only.
- DYNAMO: A machine for converting mechanical energy into electrical energy or vice versa.
- EDDY CURRENT: A current induced in the core of an armature of a motor, dynamo, or transformer caused by
changes in the magnetic field.
- EFFICIENCY: The ratio of a machine's useful work output to the total input.
- ELECTRODE: The terminal by which current leaves or enters an electrolytic cell.
- ELECTROLYTE: A substance that conducts a current by the movement of ions.
- ELECTROMAGNET: A magnet made by passing current through a coil of wire wound on a soft iron core.
- ELECTROMOTIVE FORCE (EMF): The electrical force that moves or tends to move electrons; ELECTRON: The
smallest particle of negative electricity.
- ELECTROPLATING: The electrical method of plating a surface with a metal.
- ENERGY: The ability or capacity to do work.
- FIELD: The region where a magnet or electrical charge is capable of exerting its force.
- FIELD COIL: One of the coils used to excite a field magnet.
- FIELD MAGNET: The magnet used to produce a magnetic field (usually in motors or generators).
- FLUX: Magnetic lines of force, assumed to flow from the north pole to the south pole of a magnet.
- FREQUENCY: The number of cycles of an alternating current per second.
- FUSE: A part of a circuit made of a material that will melt and break the circuit when current is increased
beyond a specific value.
- GALVANOMETER: An instrument used to measure small currents.
- GENERATOR: A machine that converts mechanical energy into electrical energy.
- GRID: A metal wire mesh placed between the cathode and plate.
- GRID BATTERY: The battery used to supply the desired potential to the grid.
- GRID LEAK: A very high resistance placed in parallel with the grid condenser.
- GROUND: A connection made directly to the earth or to a frame or structure which serves as one line of a
- HORSEPOWER: The English unit of power, equal to work done at the rate of 550 foot-pounds per second. Equal
to 746 watts of electrical power.
- INDUCE: To produce an effect in a body by exposing it to the influence-of a magnetic force, an electric
force, or a changing current.
- INDUCTION COIL: Two coils so arranged that an interrupted current in the first produces a voltage in the
- INTERRUPTER: A device for the automatic making and breaking of an electrical circuit.
- ION: An electrically charged atom.
- ISOGONIC LINE: An imaginary line drawn through points on the earth's surface where the magnetic deviation is
- JOULE: A unit of energy or work. A joule of energy is liberated by one ampere flowing for one second through
a resistance of one ohm.
- LAG: The number of degrees an alternating current lags behind voltage.
- LAMINATIONS: The thin sheets or discs making up an iron core.
- LEYDEN JAR: An early form of condenser.
- LINE OF FORCE: A line in a field of force that shows the direction of the force.
- LOAD: The energy delivered by a generator to its circuit.
- LODESTONE: A piece of magnetite.
- MAGNETIC CIRCUIT: The complete path followed by magnetic lines of force.
- MAGNETIC FLUX: The total number of lines of force issuing from a pole.
- MAGNETITE: An iron ore that is magnetic.
- MAGNETO: A generator in which the field is sup- plied by a permanent magnet.
- MEGOHM: A million ohms.
- MIL: One thousandth of an inch.
- MILLIAMMETER: An ammeter reading thousandths of an ampere.
- MILLIVOLTMETER: A voltmeter reading thousandths of a volt.
- MOTOR-GENERATOR (M-G): A generator driven by an electric motor.
- MUTUAL INDUCTION: The inducing of an EMF in a circuit by the field of a nearby circuit.
- NEGATIVE CHARGE: The electrical charge carried by a body which has an excess of electrons. (For example, a
vulcanic rod, after it has been rubbed by fur or wool, carries a negative charge.)
- NEUTRON: A particle having the weight of a pro-ton but carrying no electric charge.
- NUCLEUS: The heavy or central part of an atom. OHMMETER: An instrument for directly measuring ohms.
- PERMALLOY: An alloy containing 78.5 percent nickel and 21.5 percent iron. It has an abnormally high magnetic
- PERMEABILITY: A property of matter that indicates the ease with which it is magnetized.
- PLATE CURRENT: The current that flows from the plate of a vacuum tube.
- POLARITY: The character of having magnetic poles, or electric charges.
- POLE: One of the ends of a magnet where most of its magnetism is concentrated.
- POSITIVE CHARGE: The electrical charge carried by a body which has become deficient in electrons. (For
example, a glass rod, after it has been rubbed by silk, carries a positive charge.)
- POTENTIAL: The amount of charge held by a body.
- POWER: The time rate of doing work.
- PROTON: A positively charged, particle whose charge is equal, but opposite, to that of the electron.
- RECTIFY: To change an alternating current to a unidirectional or direct current.
- RELAY: An electrically operated device for the closing and opening of a circuit.
- RELUCTANCE: A measure of the resistance of a material to magnetic lines of force.
- RESISTANCE: The opposition of a conductor to an electric current.
- RETENTIVITY: The property of retaining magnetism.
- SATURATION, MAGNETIC: The condition of a magnetic substance when its magnetism has reached its highest
- SELF INDUCTION: The process by which a circuit induces an EMF in itself by its own magnetic field.
- SERIES CONNECTION: An arrangement of cells, generators, condensers, or conductor each carries the entire
current of the circuit.
- SERIES-WOUND: Having the armature wired in series with the field winding. (Applied to motors or generators.)
- SOLENOID: A coil of wire used to produce a magnetic field.
- SPACE CHARGE: The charge acquired by the space inside a vacuum tube due to the presence of electrons.
- STEP-DOWN TRANSFORMER: A transformer with fewer turns in the secondary than in the primary.
- STEP-UP TRANSFORMER: A transformer with more turns in the secondary than in the primary.
- THERMOCOUPLE: A pair of metals which generate an EMF by the heating of one of the junctions; it is used to
measure temperature differences.
- TRANSFORMER: A device that, without moving parts, transfers electrical energy from one circuit to another
circuit by the aid of electromagnetic induction.
- TRIODE: A vacuum tube containing a filament, grid, and plate.
- UNIDIRECTIONAL: As applied to a current of electricity, a current that flows in one direction only.
- VACUUM TUBE: A tube from which the air has been pumped out. The tube contains an element that emits
electrons when properly excited and an electrode to attract the electrons and set up a current in an external
- VOLT: The practical unit of electrical pressure.
- WATT: A unit of power produced by a current of one ampere at one volt.
- WATTMETER: An instrument for measuring electric power in watts.
APPENDIX TABLE II
OHM'S LAW -
For voltage ............... E = IR
For current ............... I = E/R
resistance .......... R = E/I
POWER EQUATION -
For power ................ P = IE
P = I2R
P = E2/R
For current ............... I = P/E
For voltage .............. E = P/I
current .............. I = (Ea - Eg)/Ra
For IR drop .............. IR = Ea
Voltage-turns .......... Ep/Es = Tp/Ts
Current-turns .......... Ip/Is = Is/Ip
...................... IpEp = IsEs
Ampere-turns .......... IpTp = IsTs
SERIES CIRCUITS -
For voltage ............... Et = E1 + E2 + E3
For current ............... It = I1 = I2 = I3 ...
resistance .......... Rt
= R1 + R2 + R3 ...
PARALLEL CIRCUITS -
For voltage .............. Et
= E1 = E2 = E3 ...
For current .............. It = I1
+ I2 + I3 ...
For resistance ......... 1/Rt = 1/R1 + 1/R2
For hp ...................... hp = P/746
For watts ................. P = 746
¶ U.S. GOVERNMENT PRINTING OFFICE; 1945- 618779
1996 - 2018
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas
and reference material while performing my work as an RF system and circuit design engineer.
The Internet was still largely an unknown entity at the time and not much was available
in the form of WYSIWYG
All trademarks, copyrights, patents, and other rights of ownership to images and text
used on the RF Cafe website are hereby acknowledged.
My Hobby Website: AirplanesAndRockets.com