Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [electrostatic]

94 questions
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Electrical Machines based on Electric Fields

Our teacher asked us this question during the lecture for Power Electromagnetics. We know that Electric Fields and Magnetic Fields are easily transformable into one another. And they are used greatly in various systems. He asked us why is it that…
Digvijay Gusain
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Why no macroscopic electrostatic electromechanical parts?

So, I understand that relays, motors, and other electromechanical devices are almost always electromagnetic devices. Why is this? I know that electrostatic motors exist, but what makes them substantially worse than electromagnetic motors? Note that…
Hearth
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What is causing this weird effect with aluminum?

I grabbed an LED and then scraped an aluminum plate with a pin, and it turned on at some points, at first I thought it was electrified but it wasn't, then I tried with another aluminum plate and it also happened. Later I tried the same thing with a…
Sartem Cacartem
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2 answers

Electrostatic precaution for sensitive chip

I just figure out today that I always manipulate chips with the "Electrostatic sensitive devices" sign by hand. I never use a grounding bracelet or even a clamp. Even if I doesn't take such precaution, chips behave as expected. Is that normal? What…
M.Ferru
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How should I use a static-shielding bag prior to opening, and why?

After grounding the ESD mat and wearing the properly grounded anti-static wrist strap, what is the correct process to take the contents out of the static-shielding bag and take it onto the antistatic work surface (ESD mat) and why? (The content of…
ForeverNoob
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Can I die from touching one capacitor lead?

Suppose I have a charged capacitor and I only touch one of the plates or leads. Will current start flowing through my body? I think yes, because there is an electric field between one plate and Earth/ground. Will the Coulomb force push charge…
user2276094
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A conductive ball connected to a capacitor

I am not asking for a task solution, but rather how to solve a problem. Say I have a ball of radius R, charged to a voltage of U (relative to the ground). I also have a flat capacitor with a side area of S, and distance between the plates of…
Karol Szustakowski
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1 answer

System of multiple conductors: image method

The problem statement, all variables and given/known data The following figure represents the traversal cut of a system with two cylindrical equal conductors of radius r0 length l at a distance d from one another and at the same distance h of a…
Granger Obliviate
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What's the current leak path of the electrostatic discharge during an EMC test?

When we develop a new product we need to pass the EMC test. I really wonder what the current path during a electrostatic discharge test is. Here is the test situation： If the EUT (equipment under test) is a metal shell, is there a discharge path?…
lukeluck
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Protecting digital electronics from nearby high voltage sparks

I am controlling a high voltage power supply to generate corona discharge. To switch it on and off I am using an AC relay controlled by a microcontroller as shown in the figure. The controller switches the power supply on for one minute and than…
Kadyan
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How to charge a capacitor with static electricity?

I want to charge a capacitor using static electricity generated by me (walking on carpet etc.) and try power a small LED or if that doesn’t work a reading on the voltmeter would be fine (it’s for a science project). I know the total power output…
Henry
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Does current flow from earth connected conductor in uniform electric field?

If we place a conductor inside of uniform external electric field then opposite charges will get induced on the both sides of conductor. What if we connect two earth wire to each side, will continuous current will flow through the conductor? As from…
Aniket Kumar
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Calculating the unknown charge using the \$2\$ remaining charges in this arrangement

The overview of the problem and the solution and my thoughts are as below. "/*" represents about my comment. We'll handle the \$3\$ point charges in the vacuum. Firstly the \$2\$ charges are arranged in the same straight line. The remaining \$1\$…
electrical apprentice
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Can an electrostatic voltage be divided with very large resistors?

Is it possible to divide an electrostatic voltage from a Van de Graff generator or electrostatic generator with very large resistors?
Ted Jackson
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Is it safe to use hot glue in electronics?

I know question seems too basic to ask but I couldn't find any specific information anywhere . I want to use hot glue gun to stick components and cables into cardboard to prevent them move or break but someone said hot glue is electrostatic and…
Mordecai
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