| 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. | |