Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 12613

The study of the presence and flow of electric charge. Charges, currents, fields, potentials.

1 vote

What happens when a compact fluorescent lamp implodes?

It very much depends on the control gear, there are a variety of designs for circuits for starting and running fluorescent tubes. I don't think any of them involve capacitors but there is likely to be …
RedGrittyBrick's user avatar
1 vote

how does electricity travel?

I ... want to know how [electricity] travels on utility poles. This is an interesting question and many aspects of the answer are surprising the first time you hear/read them. … What does move physically is not "electricity" but charged particles, in the case of metal wires on utility poles these are electrons that are not strongly bound to the metal atoms. …
RedGrittyBrick's user avatar
2 votes

transfer of electricity through electromagnetic waves

Yes. Examples RFID tags. Toothbrush chargers. Shining a torch at a solar cell. Crystal radio. You may be thinking of Tesla's World System "for the transmission of electrical energy without wires" …
RedGrittyBrick's user avatar
0 votes
Accepted

Reducing deposition on power supply wires

If the joint is not tight, there can be arcing which will damage the metal surfaces. If the joint is not airtight, most metals will corrode, for some metals, their oxides are less conductive. If tw …
RedGrittyBrick's user avatar
2 votes

IF I touch anything at 0 volt with my hands and touch earth, will I get shock? Will charges ...

In brief: No. But to be safe you need a better appreciation than the wording of your question suggests. Numbers can be arbitrary Touching a point labelled 0V might kill you. Touching a point labell …
RedGrittyBrick's user avatar
2 votes

Can electricity flow in a sufficiently large insulator?

Lets do the arithmetic, as suggested by Energizer777 $$R= \frac{\rho L}{A}$$ $$\rho_{copper} = 10^{-8} \Omega m$$ $$\rho_{glass} = 10^{11} \Omega m$$ How wide a piece of glass would I need to have …
RedGrittyBrick's user avatar
0 votes

How can voltmeter still measure potential difference if it has very large resistance?

Most portable multimeters have an impedance of 10 MΩ on their voltage ranges (excluding "Low-Z" ranges). That is enough to allow a very small but measurable current to flow. If the device under test …
RedGrittyBrick's user avatar
2 votes

Why are high voltage lines “high voltage?”

The voltage in electric cables has almost nothing to do with the amount of electric charge on or in some portion of the cable. The voltage is a measure of electric potential. Charge carriers are pre …
RedGrittyBrick's user avatar
1 vote

The measurement of electricity

electricity is the flow of electrons Electricity is about a dozen different things, one of which is the flow of charge-carriers, which in metals is a flow of electrons. … Electricity is the movement of electrons in a conductor. Not always. Take for example static electricity. Voltage is required to move the electrons along. …
RedGrittyBrick's user avatar
2 votes

What is voltage: strict but intuitive definition from accumulator's perspective

1) If I double the area of both metal plates, contacting with respective solutions, would it double the voltage output? No, the voltage is dependent on the chemistry. "D" and "AAA" sized zinc-car …
RedGrittyBrick's user avatar
4 votes
Accepted

Voltmeter forming a closed circuit

why does the voltmeter not form a closed loop with the circuit and hence cause energy to be dissipated by internal resistance It does, but the voltmeter probably has an impedance of 10,000,000 oh …
RedGrittyBrick's user avatar
1 vote

Why is it that when potential difference across a capacitor is equal to the supply voltage, ...

The flow of charge is driven by a potential difference. If the potential difference is zero, so is the flow. This is shown in Ohms law: V=IR. If V=0, I=0. In a capacitor, "charging" it removes charge …
RedGrittyBrick's user avatar
4 votes

Why are electrons attracted to a magnetic field?

Why are electrons attracted to a magnetic field? Perhaps nobody knows. You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely noth …
RedGrittyBrick's user avatar
1 vote
Accepted

Passing electrical current through magnets

Is it possible for electricity to flow through the circuit even when the magnets are not actually touching? No. …
RedGrittyBrick's user avatar
4 votes
Accepted

What is the voltage of an average carpet static shock? Can you make it lethal?

The energy in a typical static charge from walking across a carpet is too low to kill a human. It may be a few milliJoules. The energy available is approximately Voltage x Charge. The current that pa …
RedGrittyBrick's user avatar

15 30 50 per page