Information   Sheets
I-J  
Term Explanation
   
   
I Symbol used to designate current. 
   
ICEA Insulated Cable Engineers Association.
   
IEC International Electromechanical Commission.
   
IEEE Institute of Electrical and Electronic Engineers. 
   
IF Intermediate-Frequency.
   
Impedance (Z) The total opposition that a circuit offers to the flow of alternating
  current or any other varying current at a particular frequency. It is
  a combination of resistance (R) and reactance (X), measured
  in ohms.
   
Inductance (L) The property of a cicuit or circuit element that opposes a change
  in current flow, thus causing current changes to lag behind voltage
  changes. It is measured in Henrys. 
   
Induction The phenomenon of a voltage/magnetic field, or electrostatic
  charge being produced in an object by lines of force from the
  source of such fields. 
   
Inductive Sensor A sensing device that is actuated by a metal object. 
   
Insertion Force The force required to insert a contact into the mating contact. 
   
Insertion Loss A measure of the attenuation of a device by determining the
  output of a system before and after the device is inserted into the 
  system. 
   
Insulation Resistance The resistance measured in ohms at a designated voltage between
  two or more conductors separated by the insulation whose 
  resistance is being measured.