[FEE] Lecture 6 Flashcards
It states that the voltage across many types of conducting material is directly proportional to the current flowing through the material
Ohm’s Law
The simplest passive circuit element
resistor
Is the rate of energy transfer
Electrical Power
unit of electrical power equal to one joule of energy consumed in one second
Watt
capacity to do work
Electrical Energy
Classification of DC Sources in terms of energy source
Chemical sources
Solar and Photovoltaic cells
Thermoelectric Generation
Piezoelectric Generation
Electromagnetic generation
Electrical Conversion
In which chemical energy is converted to electrical energy.
chemical sources
In which solar energy is converted directly to electrical energy.
Solar and Photovoltaic cells
in which heat energy is converted directly to electrical energy.
Thermoelectric Generation
in which mechanical energy is converted directly to electrical energy as a result of the application of mechanical forces to crystals of quartz, Rochelle salt, barium titanate and so forth.
Piezoelectric Generation
Examples of Piezoelectric Generation
ceramic phono cartridges and underwater sound transducers.
which electrical energy is converted to electrical energy in the presence of a magnetic field.
Electromagnetic generation
Example of Electromagnetic generation
semiconductors using the Hall Effect.
in which alternating electrical energy is converted to direct (dc) electrical energy as a result of rectification or energy conversion.
Electrical Conversion
Example of Electrical Conversion
dc power supplies, rotary converters, and motor-generator sets.
TWO GENERAL TYPES OF ELECTRIC CIRCUIT
Direct and Alternating Current
current that varies in magnitude but not in direction.
Direct Current
Three Forms of Direct Current:
Continuous, Unidirectional, and Pulsating Direct Current
one in which an energy transfer takes place unidirectionally, with changes in value from instant to instant that either zero or so small that they may be neglected.
Continuous DC
when the current does vary somewhat in magnitude but does not reverse in direction
Unidirectional DC
one which the magnitude varies considerably and pulsates regularly there being no reversal in direction.
Pulsating DC
one in which the direction alternates regularly and, unless otherwise definitely stated, changes periodically in magnitude as well as direction.
Alternating Current
although alternating in character, increases and decreases in magnitude and changes in direction periodically with respect to time according to some definite law, in general, successive waves of current do not have the same magnitude.
Oscillating Current
An interconnection of one or more electrical devices in which there should be at least one closed path in which current may flow.
Electric Circuit
