HVAC Electrical Midterm Test Questions with Answers, A+

_____ are the particles that orbit the core of an atom - electrons ______ is the force that pushes free electrons through conductors - voltage name 3 terms meaning voltage - electromotive force (emf) potential difference and eletrical pressure a device used to generate electricity is called a - voltage source name 6 voltage sources - battery, generator, solar cell, thermocouple, alternator, transformer secondary is voltage current? - no electric current is ________ flowing through a conductor - electrons _______ is the measurement of current flow - amperage amperage tells the _____ of electrons moving thru a conductor - amount what device is used to check amperage? - ammeter conductors provide a ____ for current - path a circut with a complete path for current is said to have ________ - continuity do wires have continuity? - yes _______ _______ reverses direction at regular intervals - alternating current current alternates (reverses direction) two times every _____ - cycle ac in the usa flows at 60 cycles per _____ , which means the same as 60 _____ - seconds, hertz __________ is the opposition to current flow - resistance resistance reduces the ______of electrons flowing thru a circuit - amount amperage will be high through a circuit that has ___ resistance - low name 2 types of resistance - resistive, reactive counter e.m.f. is a type of _______ resistance - reactive counter e.m.f. is produced by ________ in motion - magnetism name 5 factors that affect the resistance of a device - material length girth temperature and magnetism in motion the resistance of an open circuit will be _______ ohms - infinite the resistance across a closed switch or wite should be ____ ohms - zero all loads have __________ - resistance name 6 loads - lamp heater motor relay coul solenoid coul transformer primary