Questions tagged [resistance]
A measure of how much a conductor opposes current flowing through it. It can also refer to a part of a circuit, which has a non-negligible resistance value.
114 questions with no upvoted or accepted answers
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Amorphous Silica Electrical Impedance Tomography
I would like to see if the idea I have for an experiment is even worth the effort and money to perform. I would like to use electrical impedance tomography to image a developed thin layer ...
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Are there measured values for the resistance contribution of vias of different diameters and depths?
I'm interested to know if there are real-world measurement values available for the resistance contribution of vias (or plated through holes).
Sure - there is no widespread definition of what a ...
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Accurate resistance measurements using analog multiplexers in cable pinout tester
I’m developing cable pinout tester with functionality of resistance measurement, but I’ve faced with some challenges.
Using MCU (STM32) I want to go through all the combinations by selecting MUXs ...
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How to design digital rheostat that can handle 100 mA?
Specification:
Bidirectional current
Output current: 1 uA to 100 mA
Terminals common-mode voltage: +/- 12V
That would be 24 Meg to 240 Ohm if that is possible.
Stability: +/- 1% if possible
Bandwidth:...
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Finding resistance between two conductors
For my electromagnetic-field class we are asked to calculate resistance between two electrodes shown as below.
The part c(i) is just a simple resistance question using the formula R=pl/a.
I don't ...
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Common term for Resistance and Conductance?
Simple question; Impedance and Admittance are complementary quantities, and can be described by the common term "Immittance". Likewise Resistance and Conductance are complimentary quantities,...
user173292
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How to find the total output resistance for a mosfet cascadinging with a bjt?
I'm working on an problem in school. The original circuit was much bigger but I replaced the two current mirrors with DC current sources for simplicity. I know \$R_{in}\$ for the mosfet is infinite so ...
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Why does a multimeter in resistance mode show initial continuity over a diode?
I originally phrased this question very differently; the original text is retained below in case background information is useful to clarify the context.
When I using this digital multimeter to ...
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What's the equivalent resistance of this circuit?
I am a student in 10th grade and our teacher gave us this schematic to work with (Remade with circuit lab):
simulate this circuit – Schematic created using CircuitLab
He asked us to find the ...
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Do the controlling voltages or currents act independent of the existence of a dependent source?
Dependent sources confuse me. We were taught a method using input and output resistances to find out whether a dependent source is VVVS, VVCS, CCVS, CCCS. Apparently for a voltage controlled source if ...
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Resistances to two batteries where the bat1_pos + bat1_neg = bat2_pos + bat2_neg? But, bat1_pos is shorter than bat2_pos
SOK makes a unit called "12-Slot Outdoor Insulated Battery Rack – Fits SOK & EG4 Batteries"
In this configuration there are two batteries next to each other stacked six sets deep. Both ...
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What is a good contact pressure for bolting steel busbars onto steel battery terminals?
I would like to achieve a good/low contact resistance. From other graphs I've seen for copper and aluminium, there's a point of diminishing returns regarding contact resistance vs contact pressure. I ...
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How to set resistance measurements of particle layers in a resistivity cell, using an electrometer?
I am new to the use of electrometers as I come from the totally different environment of analogue experiments in fluids. Although I am familiar with the electrical measurements concepts, I am ...
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Detailed calculations for DIY SSR (solid state relay) circuit
I just want to understand the calculations for a DIY SSR project.
I do know the components required but I don't know how to calculate resistance values for this circuit. Also, what is the output of ...
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Resistance measurement: Agilent 34401A vs. Fluke 179
I was attempting to measure isolation resistance between the output of an isolated DC/DC converter to machine chassis. I was somewhat surprised to see a large difference in measurement between a 6 1/2 ...
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