## Electronics (Mike Jaroch)

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### R

#### RLC CIRCUIT

An electrical circuit that has the properties of resistance, inductance, and capacitance [2].
 Keyword(s): RLC CIRCUIT

#### RMS

Abbreviation of root mean square [2].
 Keyword(s): RMS

#### ROOT MEAN SQUARE

(RMS)—The equivalent heating value of an alternating current or voltage, as
compared to a direct current or voltage. It is 0.707 times the peak value of a sine wave [2].

 Keyword(s): ROOT MEAN SQUARE , RMS

#### ROTARY CAP

A spark gap, similar to a mechanically driven rotary switch, used to discharge a pulse-forming network [12].

 Keyword(s): ROTARY CAP

#### ROTARY SWITCH

A multicontact switch with contacts arranged in a circular or semicircular manner [3].

 Keyword(s): ROTARY SWITCH

#### ROTATING FIELD

The magnetic field in a multiphase ac motor that is the result of field windings being energized by out-of-phase currents. In effect, the magnetic field is made to rotate electrically rather than mechanically [5].

 Keyword(s): ROTATING FIELD

#### ROTATING JOINT

A joint that permits one section of a transmission line or waveguide to rotate
continuously with respect to another while passing energy through the joint. Also called a rotary coupler [11].

 Keyword(s): ROTATING JOINT

#### ROTOR

(1) The revolving part of a rotating electrical machine. The rotor may be either the field or the armature, depending on the design of the machine [5]. (2) The rotating member of a synchro that consists of one or more coils of wire wound on a laminated core. Depending on the type of synchro, the rotor functions similarly to the primary or secondary winding of a transformer [15].

 Keyword(s): ROTOR

#### RPK

The symbol used to represent the resistance between the cathode and plate of a tube [6].
 Keyword(s): RPK

#### RUNNING OPEN

The teletypewriter condition where the type hammer constantly strikes the type box but does not print or move across the page [17].

 Keyword(s): RUNNING OPEN

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