Random Flashcards
resistance & resistivity, ohm's law, power & energy, series & parallel, kirchoff's law
Resistance of any material is due primarily to what factors?
material
length
cross-sectional area
temperature
the rise in the resistance of a material per degree rise in temperature to the original resistance.
temperature coefficient of resistance
R2 = R1[1 + α1 T2 − T1 ]
this law states that current is directly proportional to voltage and inversely proportional to resistance.
ohm’s law
this is the rate of doing work. rate at which energy is used.
power
the maximum amount of power that a resistor can dissipate without being damaged by excessive heat buildup
power rating
ability to do work
energy
States that the voltage across a resistor in a series circuit is equal to the value of that resistor times the total applied voltage divided by the total resistance of the series configuration.
voltage divider rule
States that the current through any branch of a parallel resistive network is equal to the total resistance of the parallel network divided by the resistor of interest and multiplied by the total current entering the parallel
current divider rule
The law specifies that the algebraic sum of the
potential rises and drops around a closed path (or closed loop) is zero.
kirchoff’s voltage law
often described as the dual of the
voltage source. this determines the direction and magnitude of the current in the branch where it is located.
current sources
what are the 3 methods of analysis?
branch current method
loop current method (mesh analysis)
node voltage method (nodal analysis)
the property of an element describing a linear
relationship between cause and effect.
linearity
states that the current in any given
branch of a multiple-source circuit can be found by determining the currents in that particular branch produced by each source acting alone, with all other sources replaced by their internal resistances.
superposition theorem
what do you call the current source appearing in previous sections
ideal source
Ideal sources can be converted from one type to another. (true or false)
false
states that, any two-terminal linear dc
network can be replaced by an equivalent circuit consisting of a voltage source(VTH) and a series resistor(RTH).
thevenin’s theorem