ELE
Resistor
a electrical component in resistance electrical which implements as a circuit element. It is as well an electronic component which are used in reducing the flow of electrons, adjusting signal levels, dividing voltages, bias active elements, and terminating transmission lines.
Nucleus
a positively charge mass within an atom, composed of neutrons and protons and processing most of the mass but occupying only a small fraction of the volume of an atom.
Conventional Current
assumes that current flows out of the positive side of the battery, through the circuit, and back to the negative side of the battery. This was the convention established when electricity was first discovered, but it is incorrect!
DC
for commercial uses such as flashlights and power supplies for electronic circuits
Resistance
is a measure of opposition of an object to the flow of electrons
Independent Current Source
is a two-terminal element through which a specified current flows. Then current is completely independent of the voltage across the element.
Independent Voltage Source
is a two-terminal element, such as a battery or generator, which maintains a specified voltage between its terminals.
Series Circuit
is one of which devices are connected that there is one only one path for current to flow.
Electron Flow
is what actually happens. The electrons flow out of the negative side of the battery, through the circuit, a n d back to the positive side of the battery.
Voltage
the work done in moving a unit charge (+1 C) through the element from one terminal to the other across a element.
Valence electrons
this value is the number of electrons in an incomplete outermost shell. A completed outer shell has valence of zero
Active Elements
those that are not passive and do not hold for all time. Examples are generators, batteries, and electronic devices that require power supply.
Electrical Charge
A material is said to have an electrical charge when it attracts or repels another charged material. A material may have either a positive or a negative electrical charge
Electron
A negatively charge elementary particle found in all atomic nuclei, having a positive charge of 1.62 x 10exp -19. The number of protons in an atoms equals that of an element
Protons
A positively charge elementary particle found in all atomic nuclei, having a positive charge of 1.62 x 10exp -19 coulombs. The number of protons in an atoms equals that of an element 1 coulomb= 6.25xexp 18 electrons
Compound
Composed of two or parts of an element
Passive Elements
- if the total energy delivered to it from the rest of the circuit is always nonnegative. Examples are resistors, capacitors, and inductors.
Electricity
A fundamental property of matter caused by the presence and motion of electrons and protons manifesting it self as attraction, repulsion, luminous and heating effects and the line
Neutron
An elementary particle found in most atomic nuclei, having no charge, mass slightly greater than that of a proton.
Matter
Anything that occupies space and has weight is called matter. All liquid gases, and solids are example of (1) in different forms. (1) is made up smaller units called atom
Molecule
Is the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more atoms is compound
Parallel Circuit
It has two or more path for current to flow
Element
One of a class substances that cannot be separated into simpler substance by chemical means
Orbital rings K Shell = 2 electrons L Shell= 8 electrons M Shell= 18 electrons N Shell= 32 electrons O Shell= 50 electrons
The planetary electrons are in successive shells called K,L,M,N,O,P and Q at increasing distances outward from the nucleus, each shell has a maximum number of electrons
Atomic Number
This gives the number of protons or electrons required in the atom for each element
Conductance
reciprocal of resistance
Power
refers to the energy delivered or absorbed by the element
Atoms
resembles the solar system with sum as the center around which a series of planets revolve.
Ohm's Law
states that the voltage across a resistor is directly proportional to the current flowing to the resistor
shells or energy levels
the orbits for the planetary electrons
Current
the rate of flow of electrons