Electronics IBET Test

138 terms by CorneliusTullius

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Completed Electronics review. Credits to notes online on blackboard *** sorry will, i changed a couple things voltage (V) = current(I)*resistance(R) ~kat *** Just a general note, sometimes the test feature can get feisty during true or false with answers like Charge and Charging, so it might me logically right but not right according to the computer, sorry that that happens. ALso, things like the formulas tend to be unforgiving. Like it will not accept Q = V*C when I inserted the answer as …

AC Current

Current periodically reverses direction

Atom

The smallest particle to which an element can be reduced and still retain its characteristics.

Closed circuit

A circuit that forms a complete path so that electric current can flow through it.

Conductor

A material that allows electric current to flow through it easily.

Control

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 (-).

Current

The movement of electric charge; the flow of electrons through an electric circuit.

DC Current

In this current, current flows in one direction only.

Electromotive force (EMF)

The force, (not voltage) that causes electric current to flow.

Electron

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.

Electrostatic field

The space around a charged material in which the influence of the electric charge is experienced.

Element

The basic materials that make up all other materials; they exist by themselves (such as copper, hydrogen, carbon) or in combination.

Energy

The capacity to do work.

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.

Insulator

A material that offers a high resistance to electric current flow.

Kinetic energy

Energy that exists because of movement.

Load

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.

Metallic bonding

The method by which loosely held atoms are bound together in metals.

Open circuit

A circuit that has a broken path so that no electric current can flow through it. A circuit with infinite resistance.

Orbit

The path along which electrons travel around the nucleus of an atom.

Orbital

Areas through which electrons move; designated as s, p, d, and f.

Path

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.

Potential energy

Energy that exists because of position.

Power

The rate at which work is done.

Resistance

The opposition to the flow of electric current in a circuit; its unit of measurement is the ohm (Ω).

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.

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.

Source

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.

Stable atom

An atom that does not release electrons under normal conditions.

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.

Valence electrons

Electrons in the outer orbit of an atom.

Voltage

Electric force, or pressure, that causes current to flow in a circuit.

Work

The transforming or transferring of energy.

Capacitance

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

No difference

When a capictor is not charged, there is _______ between the two plates in terms of charge. Since both contain the same amount of electrons.

Farad

The SI unit of capcitance

Electrolytic Capacitors

Another name for Polarized Capacitors

Parallel

This formula finds capacitance of a ______ circuit: Ct=C1+C2+C3...+Cn

Series

This formula finds capacitance of a ______ circuit: 1/(Ct)=1/C1+1/C2+1/C3+...1/Cn

10^-6

µ (micro) in terms of scientific notation means

10^-9

n (nano)in terms of scientific notation means

10^-12

p (pico)in terms of scientific notation means

Q

Symbol for Charge in Coulombs

V

Symbol for Voltage in volts

Q = C*V

Charge's Formula =

Capacitor

This stores electric charge

C

Symbol for Capacitance

Farad

Named after British physicist Michael Faraday, it can store one coulomb per volt

attracts

The positive upper plate of the capacitor _______ the free electrons of the negative plate.

Charges

A difference of potential begins to build up across the two plates, while the capacitor

Charges

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

Discharging

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

Charging

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

Discharging

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

Charging

Current flows through the capacitor while the capacitor is ______. But, current does not flow through the capacitor.

Charge

The capacitor continues to________until the difference of potential between the two plates is the same as the voltage of the battery

No more

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)?

Charge

The representation of the amount of electrons present in a material

q

Symbol for charge in a formula

Coulombs (C)

Charge is measured in (unit plural (unit symbol))

6.28*10^18

One Coulomb has the charge of (number*10^number)

Resistance

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

Resistance

is directly related to the length of a wire as well as inversly related to the area of a wire

R

Symbol for resistance in a formula is

Ohms (Ω)

Resistance is measured in (unit plural (unit symbol))

Voltage

This is electric pressure

Voltage

Results from build up of charge in a particular location

e

The symbol for voltage in a formula is

Volts (V)

Voltage is measured in (unit plural (unit symbol))

Current

This is the charge of movement

Current

This describes the number of electrons that pass a point in a given interval of time

I

Symbol for current in a formula is

Amps (A)

Current is measured in (unit plural (unit symbol))

Ohm's Law

This descries the relation between current, voltage, and resistance.

I*R

What does Voltage equal in Ohm's Law (unit symbol*unit symbol)

V/R

What does Current (I) equal in Ohm's Law (unit symbol*unit symbol)

E/I

What does Resistance equal in Ohm's Law (unit symbol*unit symbol)

Power

This describes the amount of work done by a circuit

P=I*V

What is the formula for electric power(p=unit symbol*unit symbol)

P

The symbol for Power in a formula is

Watts (W)

Power is measured in (unit plural (unit symbol))

Conductor

This type of Material allows electrons to pass through easily

Conductor

This type of material has many free electrons and few single valence electrons

Semiconductor

This type of material does not allow eletrons to pass through easily

Semiconductor

This type of material is located along the periodic staircase; their valence shell is half full

Insulator

This type of matieral does not allow virtually any electrons to pass through

Insulator

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)

Series

This circuit type only has one path in the current

Parallel

This circuit type has multiple paths for current

Series

If you break the circuit at any point in this circuit type, it stops working

Circuit Diagrams

These are used to analyze circuits

Series

This is the formula for resistance for which circuit type: Rt=R1+R2+R3+...Rn

Parallel

This is the formula for resistance for which circuit type: Rt = 1/(1/R1+1/R2+1/R3+...1/Rn)

Series

The current through each resistor is the same in this circuit type

Voltage

In a parallel circut, this is lost throughout each resistor in the same amount

10

A silver band has what percent tolerance (number)

5

A gold band has what percent tolerance (number)

20

No band has what percent tolerance (unit)

Doping

This is the process by which a small amount of foreign element is added to silicon to change its electrical properties

Silicon

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?

Silicon

This element, used in doping, has 4 valence electrons

Pentavalent

These elements Phosphorus and Arsenic have 5 valence electrons which makes them:

Trivalent

These elements Aluminum and Gallium have 3 valence electrons whcih makes them:

Free electrons

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)

Insulator

Pure silicon is a(n) (conductor, insulator, semiconductor)

Negatively Charged

When Silicon is doped with phosphorus and arsenic it becomes (negatively or positively charged)

Positively Charged

When Silicon is doped with Alumnium and Gallium it becomes (negatively or positively charged)

Transistors

These are electric switches

Diodes

These are one-way valves

off

Diodes remain (on or off) until the activation voltage is reached

0.6V

Diodes activate at how many volts for silicon (numberV)

0.3V

Diodes activate at how many volts for germanium (numberV)

1.5V-4V

LEDs activate in between how many volts (numberV-numberV)

5V

Zener Diodes acticate at (numberV)

Diodes

These reduce the voltage of the circuit without adding resistance

Depletion zone

The area where p-type and n-type meet

Barrier Voltage

This forms when opposite charges build up on each side of the depletion zone preventing the further combinatino of electrons and holes

0.6V

Rasing the voltage above a (numberV) breakes down the depletion zone

N-type

This section of a diode is known as the cathode the majority carriers are electrons (N or P-type)

P-type

This section of a diode is known as the anode the majority carriers are holes (N or P-type)

Transistors

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)

Forward

This (forward or reverse)bias of the transistor between the base and emitter turns the transistor on

NPN

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

PNP

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

Transistor

This electric part can amplify current, voltage, and power.

Integrated Circuit

This is a minature circut board produced on a single piece of semiconductor

Pin

A connection in an Intergrated Circut is called a

Forward

(Forward or Reverse) bias causes minimun resistance

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