146 / 156
Page 134
Glossary
Electrical Theory & Applications for HVACR
induced current
current that flows as the result of an induced voltage
induced voltage
potenƟal that causes current to flow in a conductor that passes through a magneƟc field
inductance
property of a circuit that allows energy to be stored in a magneƟc field
inducƟve circuit
any circuit that contains at least one magneƟc field
insulaƟon
materials with few free electrons used to cover wires to prevent short circuits and shock hazards
integrated circuit
a circuit with mulƟple semiconductors and transistors in a single circuit; someƟmes called a chip
ion
an atom that has gained or lost electrons, resulƟng in a posiƟve or negaƟve charge
J
jacket
the outside cover of a wire or cable
juncƟon box (j box)
a plasƟc or metal box where electrical connecƟons are made
jogging
quickly and repeatedly switching a motor on and off
joule
the amount of heat needed to raise the temperature of one kilogram of water 1°C; equal to one waƩ
second
jumper
a wire placed across the contacts of a component for test purposes
juncƟon
a point in an electrical circuit where the current branches out into other secƟons
K
Kirchoff’s Current Law
the sum of the currents flowing into any point or juncƟon of a circuit is equal to the sum of the
currents flowing away from that point