Random Flashcards

resistance & resistivity, ohm's law, power & energy, series & parallel, kirchoff's law

1
Q

Resistance of any material is due primarily to what factors?

A

material
length
cross-sectional area
temperature

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2
Q

the rise in the resistance of a material per degree rise in temperature to the original resistance.

A

temperature coefficient of resistance
R2 = R1[1 + α1 T2 − T1 ]

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3
Q

this law states that current is directly proportional to voltage and inversely proportional to resistance.

A

ohm’s law

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4
Q

this is the rate of doing work. rate at which energy is used.

A

power

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5
Q

the maximum amount of power that a resistor can dissipate without being damaged by excessive heat buildup

A

power rating

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6
Q
A
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6
Q

ability to do work

A

energy

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7
Q

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.

A

voltage divider rule

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8
Q

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

A

current divider rule

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9
Q

The law specifies that the algebraic sum of the
potential rises and drops around a closed path (or closed loop) is zero.

A

kirchoff’s voltage law

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10
Q

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.

A

current sources

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11
Q

what are the 3 methods of analysis?

A

branch current method
loop current method (mesh analysis)
node voltage method (nodal analysis)

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12
Q

the property of an element describing a linear
relationship between cause and effect.

A

linearity

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12
Q

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.

A

superposition theorem

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13
Q

what do you call the current source appearing in previous sections

A

ideal source

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14
Q

Ideal sources can be converted from one type to another. (true or false)

16
Q

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).

A

thevenin’s theorem