Current periodically reverses direction
The smallest particle to which an element can be reduced and still retain its characteristics.
A circuit that forms a complete path so that electric current can flow through it.
A material that allows electric current to flow through it easily.
The part of an electric system that affects what the system does. Like a switch
Conventional current flow
Current flow assumed to be in a direction from high charge concentration (+) to low charge concentration (-).
The movement of electric charge; the flow of electrons through an electric circuit.
In this current, current flows in one direction only.
Electromotive force (EMF)
The force, (not voltage) that causes electric current to flow.
An atomic particle said to have a negative (-) electric charge; ____________ 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.
The space around a charged material in which the influence of the electric charge is experienced.
The basic materials that make up all other materials; they exist by themselves (such as copper, hydrogen, carbon) or in combination.
The capacity to do work.
Electrons located in the outer orbit of an atom that are easily removed and result in flow of electric current.
The part of an electric system that shows whether the system is on or off or that a specific quantity is present.
A material that offers a high resistance to electric current flow.
Energy that exists because of movement.
The part of an electric system that converts electric energy into another form of energy, such as an electric motor that converts electric energy into mechanical energy.
The method by which loosely held atoms are bound together in metals.
A circuit that has a broken path so that no electric current can flow through it. A circuit with infinite resistance.
The path along which electrons travel around the nucleus of an atom.
Areas through which electrons move; designated as s, p, d, and f.
The part of an electric system through which electrons travel from a source to a load, such as the electric wiring used in a building.
Energy that exists because of position.
The rate at which work is done.
The opposition to the flow of electric current in a circuit; its unit of measurement is the ohm (Ω).
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.
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.
The part of an electric system that supplies energy to other parts of the system, such as a battery that supplies energy for a flashlight.
An atom that does not release electrons under normal conditions.
A charge on a material that is said to be either positive or negative.
Electricity at rest caused by accumulation of either positive or negative electric charge.
Electrons in the outer orbit of an atom.
Electric force, or pressure, that causes current to flow in a circuit.
The transforming or transferring of energy.
The property which enables a device to store electrical energy by means of electrostatical fields.
lead, metal plates, dielectric material
A capictor has three principal parts which are
When a capictor is not charged, there is _______ between the two plates in terms of charge. Since both contain the same amount of electrons.
The SI unit of capcitance
Another name for Polarized Capacitors
This formula finds capacitance of a ______ circuit: Ct=C1+C2+C3...+Cn
This formula finds capacitance of a ______ circuit: 1/(Ct)=1/C1+1/C2+1/C3+...1/Cn
µ (micro) in terms of scientific notation means
n (nano)in terms of scientific notation means
p (pico)in terms of scientific notation means
Symbol for Charge in Coulombs
Symbol for Voltage in volts
Q = C*V
Charge's Formula =
This stores electric charge
Symbol for Capacitance
Named after British physicist Michael Faraday, it can store one coulomb per volt
The positive upper plate of the capacitor _______ the free electrons of the negative plate.
A difference of potential begins to build up across the two plates, while the capacitor
An electrostatic field is created between the plates in the diaeletric material as the capacitor
T = R*C
The formula for a capacitor to fully charge/discharge
What is the name of the process? When switch connects the capacitor to R2 the free electrons on the negative plate rush through R2 to the positively charged plate. The flow of electrons continues until the two plates are once again at the same potential. The capacitor is _____, and the current stops
RC Time Constants: This is describing____: The rate of current flow changes, as the capacitor _______, it begins to be only affected by the resistance of the circut, later it gets a resistance of its own, and it begins to slow the current
RC Time Constants: This is describing_____:As the capacitor begins to _______, the potential between the plates are very high, current is determined by this potential and the resistance in the ______ path. As the capacitor_____ the potiential lessens and the current slows
RC Time constant
We can not determine the time because of changing current values. But if one divides the full amount of charge/discharge time into five intervals, it can become a single interval of time. This is described as the
Current flows through the capacitor while the capacitor is ______. But, current does not flow through the capacitor.
The capacitor continues to________until the difference of potential between the two plates is the same as the voltage of the battery
How much more current can flow through the capacitor once it has the same voltage as the battery (chose no more, a decreased amount, the same as in the beginning, ralph nader)?
The representation of the amount of electrons present in a material
Symbol for charge in a formula
Charge is measured in (unit plural (unit symbol))
One Coulomb has the charge of (number*10^number)
This is affected by four factors: the Length of wire, Material the wire is made of, cross sectional area of the wire, temperature of wire
is directly related to the length of a wire as well as inversly related to the area of a wire
Symbol for resistance in a formula is
Resistance is measured in (unit plural (unit symbol))
This is electric pressure
Results from build up of charge in a particular location
The symbol for voltage in a formula is
Voltage is measured in (unit plural (unit symbol))
This is the charge of movement
This describes the number of electrons that pass a point in a given interval of time
Symbol for current in a formula is
Current is measured in (unit plural (unit symbol))
This descries the relation between current, voltage, and resistance.
What does Voltage equal in Ohm's Law (unit symbol*unit symbol)
What does Current (I) equal in Ohm's Law (unit symbol*unit symbol)
What does Resistance equal in Ohm's Law (unit symbol*unit symbol)
This describes the amount of work done by a circuit
What is the formula for electric power(p=unit symbol*unit symbol)
The symbol for Power in a formula is
Power is measured in (unit plural (unit symbol))
This type of Material allows electrons to pass through easily
This type of material has many free electrons and few single valence electrons
This type of material does not allow eletrons to pass through easily
This type of material is located along the periodic staircase; their valence shell is half full
This type of matieral does not allow virtually any electrons to pass through
The valence shell in this matieral is almost full
Series and Parallel
What are the two primary circuts: (shorter one[in terms of letters] and longer one)
This circuit type only has one path in the current
This circuit type has multiple paths for current
If you break the circuit at any point in this circuit type, it stops working
These are used to analyze circuits
This is the formula for resistance for which circuit type: Rt=R1+R2+R3+...Rn
This is the formula for resistance for which circuit type: Rt = 1/(1/R1+1/R2+1/R3+...1/Rn)
The current through each resistor is the same in this circuit type
In a parallel circut, this is lost throughout each resistor in the same amount
A silver band has what percent tolerance (number)
A gold band has what percent tolerance (number)
No band has what percent tolerance (unit)
This is the process by which a small amount of foreign element is added to silicon to change its electrical properties
Here is a little joke to cheer you up while taking the test, do not worry this is the only one, I apologize in advance though for the corny humour, but anyways, here is a wee respite, what element is considered the jester of the jail?
This element, used in doping, has 4 valence electrons
These elements Phosphorus and Arsenic have 5 valence electrons which makes them:
These elements Aluminum and Gallium have 3 valence electrons whcih makes them:
When Silicon is doped with phosphorus and arsenic they have (or another question could be what is the majority carrier?)
Holes (missing bonds)
When Silicon is doped with Aluminum or Gallium there are (or another question could be what is the majority carrier)
Pure silicon is a(n) (conductor, insulator, semiconductor)
When Silicon is doped with phosphorus and arsenic it becomes (negatively or positively charged)
When Silicon is doped with Alumnium and Gallium it becomes (negatively or positively charged)
These are electric switches
These are one-way valves
Diodes remain (on or off) until the activation voltage is reached
Diodes activate at how many volts for silicon (numberV)
Diodes activate at how many volts for germanium (numberV)
LEDs activate in between how many volts (numberV-numberV)
Zener Diodes acticate at (numberV)
These reduce the voltage of the circuit without adding resistance
The area where p-type and n-type meet
This forms when opposite charges build up on each side of the depletion zone preventing the further combinatino of electrons and holes
Rasing the voltage above a (numberV) breakes down the depletion zone
This section of a diode is known as the cathode the majority carriers are electrons (N or P-type)
This section of a diode is known as the anode the majority carriers are holes (N or P-type)
These are 3 terminal switches
Emitter, Base, Collector
The three parts of the transistor from left to right looking from the flat side are (part, part, part)
This (forward or reverse)bias of the transistor between the base and emitter turns the transistor on
Once the what (NPN or PNP)type transistor is on, the majority of the current flows from theEmitter into the Collector and a small current from the base to the emitter
Once the what (NPN or PNP)type transistor is on, the majority of the current flows from theEmitter into the Collector and a small current from the emitter to the base
This electric part can amplify current, voltage, and power.
This is a minature circut board produced on a single piece of semiconductor
A connection in an Intergrated Circut is called a
(Forward or Reverse) bias causes minimun resistance