# Shared Flashcard Set

## Details

Intro To ElectricalEngineering
basic electronics
24
Engineering
08/09/2008

Term
 Atom
Definition
 Smallest particle that an element can be divided into before it loses characteristics of the element.
Term
 Electron
Definition
 Negativly charged particle that orbits the atom
Term
 Protons
Definition
 Positively charge particle that can be found in the neucleus
Term
 Neutrons
Definition
 neutral particle found in the neucleus
Term
 Valence Shell
Definition
 The outermost layer of electrons, there are 8 valence electrons in a stable shell
Term
 Volt
Definition
 The potential difference in charge.
Term
 Ground
Definition
 A common point in a circuit, and often becomes a reference point for voltages
Term
 Resistance
Definition
 an opposition to the flow of electricity
Term
 Conductor
Definition
 a material that provides a relativly easy path for current
Term
 Insulator
Definition
 a material that does not provide a path for current to flow
Term
 Ohms Law
Definition
 The relationship between current, voltage, and resistance. V=RxI
Term
 Kilo
Definition
 Prefix meaning 1000, k
Term
 Milli
Definition
 Prefix meaning 1/1000, m
Term
 What are the three forms of Ohms Law?
Definition
 V=RxI , R=V/I , I=V/R
Term
 What are the three forms of the power formula?
Definition
 P=VxI , P=V^2/R , P=I^2xR
Term
 What is a resistor, and what three functions does it most commonly perfor?
Definition
 A resistor is a device that adds a known amount of resistance to a circuit. It can be used to divide voltage, it can be used to limit current, and it can be used to discharge voltage stored in another device
Term
 What is the formula for voltage across a series resistor?
Definition
 VRx=Va * Rx/RtWhere... VRx = Voltage across Rx Va = Applied Voltage Rt = Resistance total Rx = Resistor Voltage
Term
 Coulomb
Definition
 Unit of charge 6.25 x 10^18 electrons, Q
Term
 Ampere
Definition
 Equals 1 coulomb of charge past one point in one second
Term
 What 4 faults can be encountered when troubleshooting a resistor?
Definition
 1.Resistors can increase in resistance2.Resistors can become open3.Resistors can decrease in resistance4.Resistors can become shorted.
Term
 In a series configuration, if a resistor was to increase in resistance what signs would you expect the circuit to show?
Definition
 There will be less current and a smaller voltage drop across each of the remaining resistors.
Term
 In a series configuration, if a resistor was to become open what signs would you expect the circuit to show?
Definition
 There will be no complete path for current, and the entire system voltage could be measured across the open resistor.
Term
 In a series configuration, if a resistor was to decrease in resistance what signs would you expect the circuit to show?
Definition
 More current will flow through a circuit, a larger than normal voltage will appear across the remaining resistors, and a smaller than normal voltage drop will appear across the defective resistor.
Term
 In a series configuration, if a resistor was to become shorted what signs would you expect the circuit to show?
Definition
 The voltage drop across the resistor becomes zero, and the other good resistors voltage drop increases.
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