Talk:Electromagnetic induction

Wrong symbol?

I read:

If the path Σ is not changing in time, the equation can be rewritten:

$\oint _{\partial \Sigma }\mathbf {E} \cdot d{\boldsymbol {\ell }}=-{\frac {d}{dt}}\int _{\Sigma }\mathbf {B} \cdot d\mathbf {A} .$

The surface integral at the right-hand side is the explicit expression for the magnetic flux Φ_B through Σ.

I think that should be:

If the path ∂Σ is not changing in time [...]

Electromagnetism in vehicles

There is an issue with electromagnetism appearing in vehicles lately. I've seen a couple on the road. I can find out the inventions origins through the principles of science 1.)ev with two sounds of two motors 2.) if you hav a voltage reader on your ev that has two different voltage settings. 3.) if you primary use dc instead of ac induction on top of that, if the oscilation on a voltmeter goes off in midair on your electric vehicle, esp if on the grid. However, they remain illusive, they are not copyrighted for corporations but for individual inventors pursueing copyright ie troy reed.

if there is a problem with your electromagnetic vehicle let me know. The sound that comes from the electric motor should sound like a missile. If it does not, it is a standard electric car. If the battery drains completly, its another indication of it being stanard. If the wall charge is more than half-an-hour.

"Faraday's law induction" listed at Redirects for discussion

The redirect Faraday's law induction has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Readers of this page are welcome to comment on this redirect at Wikipedia:Redirects for discussion/Log/2025 May 11 § Faraday's law induction until a consensus is reached. Constant314 (talk) 17:29, 11 May 2025 (UTC)

Misaligned Content

As of writing this, the Series overview box is located not at the top of the page but next to the "See also" section of the article Tacatgo (talk) 14:18, 16 May 2025 (UTC)

History

In Souvenirs et Mémoires Jean-Daniel Colladon admits that, in 1825, he nearly made a very big discovery in the field of electricity: that of electromagnetic induction. Colladon was seeking to prove that a magnet presented to a coil of conducting wire can induce an electric current in the wire. In order to ensure that the magnet did not interfere with the galvanometer he placed the latter in a different room. After presenting the magnet to the wire coil, he moved to the other room to observe the galvanometer and saw that the needle had not moved. The young scientist had not realised that induction is transitory and occurs only when the magnet passes in front of the wire. He would have observed this had he left the galvanometer in sight. (Jean-Daniel Colladon p. 5) Pilot Pirx (talk) 20:53, 18 November 2025 (UTC)