I just loosened my strings because i had to stick my hand in there to re attach the strap button

when i was winding them back up i thought i was winding the b but it was actually the high e and i over tightened it and it broke

ive got a 12 from an electric set but not an acoustic, are they the same? I'm probably going to use it anyway because the stores are closed, but im just wondering
They're both plain steel, although electric strings normally have some kind of plating, but it shouldn't matter too much. Also, a 12 in electrics is generally lighter than a 12 in acoustics.
really electric 12's are lighter? isn't that a measurement though?
The unwound strings are pretty much made of the industry-standard "music wire" in standard gauges.