NACE Chapter 01 Flashcards
Voltage can be defined as
Electromotive Force
Current is the
Flow of electrons
Resistance is the …. of/to current flow
Opposition
Voltage compares to ….. in a gas system
Pressure
Current compares to …. in a liquid piping system
Flow of product
Resistance compares to … in a gas or liquid piping system
Orifice Effect
Ohm’s Law Formula
E=I*R
Ohm’s Law
Relationship between the ratio of voltage and current to the resistance of a circuit.
The rate at which energy is used by an electrical device.
Power
Law states that the sum of the source voltages around any closed loop of a circuit is equal to the sum of the voltage drops across the resistances in that loop
Kirchoff’s Voltage Law
Law states that as much current flows away from a point as flows toward it. Useful in analyzing parallel circuits
Kirchoff’s Current Law
May be used to increase or decrease voltage or to isolate an incoming voltage source from the outgoing voltage.
Transformers
Total opposition that a circuit presents to alternating current similar to resistance in a direct current circuit.
Impedance
Instruments have a needle that rotates across the meter face and indicates the reading on a scale.
Analog meter
Electronic instruments with digital display the reading
Digital meter
