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Terms in this set (54)
Branch
A portion of a circuit that contains a load, and as a result, values for current, voltage, and resistance. The values of each branch of a circuit determine the total applied values for current, voltage, and resistance
Capacity
The amount of electricity that can safely flow through a wire without the wire overheating
Combination Circuit
A route for the flow of electricity that has elements of both series and parallel circuits
Control
A part or component in a circuit that controls the flow of electricity
Current
The flow of electricity. Current is measured in amps (A)
Conventional current flow
Current flow assumed to be in a direction from high charge concentration (+) to low charge concentration (-)
Current Adds
A Kirchoff Law for DC parallel circuits stating that the total current of the circuit In a parallel circuit is the sum of the currents through each individual branch, regardless of the number of branches.
Denominator
The expression in the bottom location of a fraction, below the fraction bar
Electron
An atomic particle said to have a negative (-) electric charge; electrons are the means by which the transfer of electric energy takes place.
Electron current flow
Current flow assumed to be in the direction of electron movement from a negative (-) potential to a positive
(+) potential
Electromotive force (EMF)
The pressure, or force, that causes electric current to flow
Free electrons
Electrons located in the outer orbit of an atom that are easily removed and result in flow of electric current
Indicator
The part of an electric system that shows whether the system is on or off or that a specific quantity is present
Integrated circuit
An interconnected array of active and passive elements in a semiconductor substrate capable of performing at
least one complete electronic circuit function.
Load
The part or component in a circuit that converts electricity into light, heat, or mechanical motion. Examples of loads are a light bulb, resistor, or motor
Ohm's Law
The universal truth stating that it takes one volt to push one amp through one ohm
Parallel Circuit
A route for the flow of electricity that has a branched path for each load. Parallel circuits do not require all loads to be switched on in order for the other loads in the circuit to function
Path
A conductor that directs electricity in a circuit. The path is often copper wire
Power
The rate at which a device converts electrical energy into another form, such as heat or light. Power is measured in watts
Product Over Sum Method
An equation for determining the total resistance for a parallel circuit. The product over sum method
divides a pair of resistors, and then divides the result by another resistor, over and over again until only one pair is left
Reciprocal Formula
An equation for determining the total resistance for a parallel circuit. The reciprocal formula finds the total
resistance of a parallel circuit by calculating the reciprocal of the sum of the reciprocals of the individual branches
Resistance
The opposition to current flow. Resistance is measured in ohms (Ω)
Resistor
A device that restricts current flow and produces work, such as heat
Resistors Of Equal Value Method
An equation for determining the total resistance for a DC parallel circuit with resistors that have the same value. The resistors of equal value method finds the total resistance by dividing the value of one individual resistor by the number of branches
Series Circuit
A route for the flow of electricity that has only one path. Series circuits are limited because, for any load to work,
every load in the circuit must be switched on
Source
The device that provides electrical power to a circuit. The source is the origin of electricity, such as a battery
Metallic bonding
The method by which loosely held atoms are bound together in metals
Kinetic energy
Energy that exists because of movement
Current AC
Current periodically reverses direction
Current DC
Current that travels in one direction. Direct current does not reverse the direction of flow
Insulator
A material that offers a high resistance to electric current flow
Conductor
A material that allows electric current to flow through it easily
Semiconductor
A material that has a value of electric resistance between that of a conductor and an insulator and is used to manufacture solid-state devices such as diodes and transistors
Closed circuit
A circuit that forms a complete path so that electric current can flow through it
Open circuit
A circuit that has a broken path so that no electric current can flow through it; A circuit with infinite resistance
Short circuit
A circuit that forms a direct path across a voltage source (with little or no resistance) so that a very high and possibly unsafe electric current flows
Energy
The capacity to do work
Potential energy
Energy that exists because of position
Ampere
The unit of electric charge, which is the basic unit of measurement for current flow in an electric circuit. (A)
Ohm
The unit of measurement of electric resistance (Ω)
Work
The transforming or transferring of energy
Electrostatic field
The space around a charged material in which the influence of the electric charge is experienced
Valence electrons
Electrons in the outer orbit of an atom
Coulomb
The SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere. This amounts to ~ 6.24 x 1018 electrons (or about 6 billion trillion) electrons that flows past that point in 1 second. That's 1 coulomb of charge!
Static charge
A charge on a material that is said to be either positive or negative
Static electricity
Electricity at rest caused by accumulation of either positive or negative electric charge
Volt
The unit of measurement of electric potential (V)
Voltage
Electric force, or pressure, that causes current to flow in a circuit
Voltage Drop
The amount of voltage needed to push a given amount of current through a given amount of resistance
Watt
The unit of measurement of electric power (W)
Potentiometer
An adjustable resistor which consists of a wiper that slides across a resistive strip to deliver an increase or decrease in resistance. The level of resistance will determine output of current to the circuit
Diode
An electrical device allowing current to move through it in one direction with far greater ease than in the other
LED
Light-emitting diode
Breadboard
A board for making an experimental model of an electric circuit
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