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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 …
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. …
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" …
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 …
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 …
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 …
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 …
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 …
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. …
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 …
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 …
1
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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 …
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 …
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. …
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 …