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Registered Member #2063
Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352
couldn't help my self but lol'ed in class when I saw this question. the text book was from a grade 12 advanced functions course. felt like a boss after prooving my teacher wrong AND being the only person that got the right answer.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
haxor5354 wrote ...
couldn't help my self but lol'ed in class when I saw this question. the text book was from a grade 12 advanced functions course. felt like a boss after prooving my teacher wrong AND being the only person that got the right answer.
if youre reffering to the 120 Vrms versus 120 Vp-p then you might be right, let me think a minute.
EDIT: im getting...
a) 120Vrms x sqrt(2) = 169.7V+p-p b) 1s / 60Hz = 0.0167s for each single cycle c) 169.7 Vp-p x sin( X 60Hz x 2 x PI ) --- or --- (120Vrms x sqrt(2)) x ( sin( X 60Hz x 2 x PI ) ) d) Looks like a normal sine wave starting upward at y and x = 0
* bold indicates letter X, while x indicates multiplication.
Registered Member #2063
Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352
max voltage is (120v * root 2) thats why if u fullwave rectify AC voltage and charge a capacitor, the cap's voltage will be root 2 multiplied by the RMS voltage of the AC voltage
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Hahaha that's awesome. Looks like they wanted a real life model to teach simple sine functions and just thought no one at that level would know the difference between rms and "max" voltage.
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text book misinformation.....
