Linked Questions

11 votes
5 answers
2k views

Alternate explanation for energy flow in electricity as explained in this video

The question is about this video from a youtube channel called Veritasium. It is a popular physics/math youtube channel and topics discussed are usually fact checked and accurate. The gist of the ...
user13267's user avatar
  • 269
24 votes
5 answers
5k views

Doesn't Veritasium's Recent Video About Circuits Violate The Speed Of Light?

A recent Veritasium video discusses the following circuit: ...
David's user avatar
  • 249
16 votes
5 answers
4k views

How is the answer to this question $1/c$ seconds?

This is a question from the YouTube science content channel Veritasium. The below image shows the question. The question is about when will the bulb begin to glow after the switch is turned on. The ...
User's user avatar
  • 374
12 votes
2 answers
2k views

Which electrons kill you during electrocution?

I understand that there are three velocities in play in a circuit (I haven't studied Physics past high school so give me some rope) v1: the velocity by which the electrical field propagates through ...
Marcus Junius Brutus's user avatar
15 votes
2 answers
4k views

Why is the return current through a printed circuit board's ground plane concentrated below the circuit trace?

The Wikipedia article on ground plane says In addition, a ground plane under printed circuit traces [the paths that the circuit currents take] can reduce crosstalk between adjacent traces. When two ...
tparker's user avatar
  • 48.4k
4 votes
3 answers
2k views

A loop of wire with circumference of a lightyear is connecting a bulb and a battery. How long will the bulb take to light up?

Imagine a circular loop of conducting non wire with a perimeter of a light year. There is a powerful battery (able to produce a voltage that is higher than the drop in wire resistance) and a bulb ...
User's user avatar
  • 374
4 votes
2 answers
2k views

How does energy flow in a circuit? (Veritasium vs. Science Asylum) [duplicate]

I have recently watched two YouTube videos on this subject, that you can see here (first by "Science Asylum" and the other by "Veritasium"). https://youtu.be/C7tQJ42nGno https://...
RandomGuy's user avatar
  • 117
3 votes
1 answer
926 views

Veritasium Electricity Follow-Ups: Insulators, Switch Location, larger gap

This question is similar to: Doesn't Veritasium's Recent Video About Circuits Violate The Speed Of Light? In what order would light bulbs in series light up when you close a long circuit?, ...
ListsOfArrays's user avatar
2 votes
5 answers
809 views

Is an open circuit completely dead?

Probably the answer should be yes, it's like there would be no electricity source at all. But when I ask what's happening after a switch is turned on, I get the answer that the electricity then goes ...
George Lee's user avatar
1 vote
2 answers
314 views

In a simple electric circuit with battery and lamp, how does the lamp light up? [duplicate]

I watched Veritasium's video on big misconceptions of electricity, i remember when we learn how does lamp light up in the circuit, our teacher said it is the kinetic energy of electrons transfer to ...
DORA's user avatar
  • 111
0 votes
2 answers
172 views

Electromagnetic field around a conductor with current

According to this video https://www.youtube.com/watch?v=bHIhgxav9LY I have a question: If the glowing of a light bulb is the result of energy supplied from the electromagnetic field around a conductor,...
User's user avatar
  • 103