| impedance drop | Circuits With Resistance and Inductive Reactance |
| in-phase component | A More Convenient Notation |
| inclined-coil attraction | Iron-Vane Voltmeters and Ammeters |
| indicating instruments | Types of Instruments |
| inductance | Inductance |
| | Mutual Inductance |
| | Inductive Reactance |
| | Multi-Part Series Circuit with Resistance and Inductance |
| | Parallel Circuits With Resistance and Inductance |
| | Parallel Circuits With Resistance, Inductance, and Capacitance |
| | Power in a Circuit With Resistance and Inductance |
| | Circuit Containing Inductance Only |
| | Circuit With Inductance and Resistance Only |
| | Measurement of Power and Power Factor |
| | The Kv-a Vector Diagram |
| inductance-input filter | Relaxation Oscillators |
| inductive reactance | Inductive Reactance |
| | Circuits With Resistance and Inductive Reactance |
| inductive shunt | Interpoles |
| instantaneous power | Power in a Circuit With Resistance Only |
| instantaneous value | Instantaneous Values of Electromotive Force |
| insulator | Conductors and Insulators |
| integrating meters | Types of Instruments |
| interpoles | Interpoles |
| iron core | Magnetic Circuit |
