Caution: While the simple question asked here itself is ok, thanks to @ShayminGratitude's answer and some further research I did, I have found that the premises on which the deeper curiosities this question was prodding at were two wrong assumptions: One- that Misaka affects wind turbines by her machine-control ability (it's actually her EM wave ability), and two- that the wind turbine begins turning due to that ability (I later found that it was likely due to coincidental wind). Please enjoy this display of my analytical foolishness.
In the Railgun anime's second season, episode 16, starting at 19:20, Misaka is visiting Touma with homemade cookies in appreciation for saving her sisters by defeating Accelerator. After some classic tsundere-style failure to communicate, when Touma is about to leave (at 20:14), saying "Jaa na, Biribiri" ("See you later, Sparky"), Misaka asks him to remember her name, to which he responds by saying "Matana, Misaka" ("See you later, Misaka"- presumably the first time in the anime that she hears him call her by name). At that moment when he says that, the screen just shows a nearby wind turbine, and after he finishes saying it, for a split second, shows the wind turbine beginning to turn.
The implication (I'm 90% sure) is that Touma calling her by name made her heart flutter a bit, which caused the nearby turbine to begin moving, which sort of (more on this later) makes sense, since Misaka has the ability to take control of machines. I thought it was a neat/cute artistic, visual detail.
Does this little visual detail also happen in the light novel and/or the manga adaptation of the light novel?
I haven't read the light novels or the manga adaptation. I imagine it's easy to do in two panels in a manga (one panel of stationary turbine, and one of a turbine turning with some motion lines), but that something so visual would be difficult to convey "naturally" to the same effect in a novel without being an awkward distraction (I feel like it would be an awkward / unnatural reading experience to suddenly read "at that moment, a nearby wind turbine which was stationary began to turn" (or maybe I just can't imagine an elegant execution because I have no writing background)).
The deeper reason for my curiosity: "In-universe"-reality-checking the anime's faithfulness to the canonical limitations of Misaka's machine-control abilities
There's a somewhat deeper reason I'm asking this to do with Misaka's abilities. Bear with me because it'll seem like I'm overanalyzing, but I'm genuinely interested in these things, and I think it has significance in the universe of A Certain Scientific Railgun where my experience has been that the fictional, but science-based mechanics are quite self-consistent, and that the author cares about that self-consistency.
The reason I'm asking this is because I want to know how canonical it is- how faithful it is to Kazuma Kamachi (the author of the light novels)'s design of Misaka's abilities and their limitations.
In the anime, Misaka's non-magnetism-based machine-control ability demonstrations are (to my memory) always at close-range- either she is already touching the machine / one part of the connected system / a device that can communicate with the target system, or she is close enough that reaching out her hand a little further would allow her to touch it / one part of the connected system. I think you can see how that would at least make me as a viewer think that for her to be able to control a machine electrically, she needs to be within physical reaching distance of it or a device that can communicate with it.
Some examples: From season 2: ep3 at 6:48, ep3 at 17:17, ep7 0:00, ep10 at 18:26, ep10 at 18:40, ep12 at 20:14, (the same applies to the sisters) ep16 at 0:28-1:17. Some from season 3: ep1 at 0:47, ep4 at 11:28, etc.
The wind turbine is on the other side of the bridge she's standing on at that moment (see timestamp 20:54), and I'm not aware of her carrying or interacting with any device at that time that would allow her to remotely communicate with the turbine or its controlling system.
That's why I'm wondering if this was a "non-canonical" (where "canon" here refers to Kazuma Kamachi's design of Misaka's abilities and their limitations), artistic decision made by the manga adaptors or the anime producers that wasn't designed with the canonical limitations of Misaka's abilities in mind.
Note: I guess that if this long-distance machine control were found to not be canonical, one might be able to explain this with "the power of love and friendship"™, but if that's really the explanation, I'd expect it to be backed up with the same level of in-universe "rigour" as it was when that reason was given in season 2 ep24 at 16:04 when Febri wakes up Janie (emphasis added):
Nunotaba: We need Febri to release Jani from the runaway system. She's not taking any inputs from the outside, but because they share the same biological base, strong emotions from Febri just might reach her.
Saten: Naruhodo. So basically, the power of love?
Nunotaba: *blushes* Huh? I... I guess.