I just wrote, I that might be wrong. Did you do it differently?
I didn’t do it at all. If I were to guess you were supposed to substitute emf/(R+r) for I
that would make sense, hopefully the curve is nice this year.
did anybody else have form M?
Did anybody know how to use the logarithms on frq #3 to graph the data points? That made no sense to me
I came to form O. I saw two derivation problems. I conquered (at least 1/3 of) them.
Form M. the log problem I probably got 1 point on. and everyone in my class had trouble with timing for the MC. most of us had to randomly fill in at least the last 3 questions.
Hopefully most had problems with the log thing. May the curve be ever in our favor lol
lol
Were there frqs not ridiculously hard?
How do you do that log question… I ended up solving for n and got like -ln(Force)/ln(Position) so I just found the ln of each and added those to the charts, and I plotted that in the graph, took the slope to get n.
I dunno if it’s right but I felt like the overall test was okay. The other two FR’s were really fun for me haha it was challenging but I liked them. The MC was awesome too.
So who else was challenged by the frqs?
Yeah I had no idea how to find the varying dielectric constant of that capacitor at all lol
I don’t remember what the last few questions of #2 frq of form M are asking for. Can anyone recall that?
@HughHuang96824 I don’t remember what form I had for the free response, but my FR2 was about a loop with current and magnetism. The last few questions of that FRQ had to do with a way smaller loop with resistance R, and trying to find the direction of the magnetism and current induced due to the bigger loop. The last question was about calculating the current induced in the smaller loop due to the bigger loop.
@InductiveCurrent Thanks! The induces current is counterclockwise, the current is the derivative of B times the area of small loop/R right?
thats what i got^
I think I got form M, the one with log as the last question. That last question tripped me over lol. I did not know how to set up an equation for that F(x) = C/x^n. Was I supposed to take the integral to find the Electric Potential Energy? How did you guys do it? 
I slayed the 2nd questions pretty bad, it was really easy.
@JackPham you can solve the C by the first column of the table, x=1, F=81.3. So the equation should be F=81.3/x^n. Then ln(81.3/F)/lnx=n. I figure this out in the last 5 min T T No enough time left
Is the answer for the first frq form M, b, ii, I=0.12e^-TR/L