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I see this Monbukagakusho Physics 2010 SolutionHello everyone,
I'll appearing the MEXT examination this year and would really like to know if there's anyone who has solved the physics 2010 paper
how were the examination questions of 2011 and 2012.if anyone knows then plz help. .
Hello Monicca!
For present status you write your current status. So, because you haven't graduated yet, write something like "Studying at (where you are studying), expected to graduate (when)."
Can't help with your second question because I didn't apply for the undergraduate level, but my advice in general would be to make sure you answer the questions correctly regardless of how much or how little space it takes to do so.
Good luck!
I see this Monbukagakusho Physics 2010 Solution
However, I'm not sure his methods will be correct, although his answers are correct.
Especially the magnetic Part IV- Q5 question makes me worried.![]()
My method to find B is using differential forms of B= (u_0)I/(2pi)r (ie., differentiate this B, you will get dB= -[(u0)I/(2pi)r^2]*dr) and integrate this differential over r=[r-b,r+b]. Since I don't think they expect us to know the Bivot-Savart differential definition of B and form double integral calculus, though it's possible (very unlikely I think).
If anyone knows a more appropriate solution for high school students since this exam is also for non-undergraduate student, please let me know.
Hi Garden,
I would like to see your method in more detail.
It's just like I tried that method but I got stuck when B is not uniform in wire BC and AD.
Finally, my argument is using "AB remains parallel with current I"
So "each pair of points" on BC and AD satisfies
F_magnet = F_electric (all positive charges go to BC and the same amount of negative charges go to AD)
-> qE = qvB << this equation are used for all pairs in BC vs. AD
and |E|=V/d= IR/d across all pair.
However B is not uniform (if B is uniform, total B is equal to B*total length BC or AD), so I need to integrate dB over [r-b,r+b] to include all pairs on BC and AD and R should be somewhere between BA or CD.
By the way, do you do all the past exam problems (2010-2007)? Now I got stuck a "mirror-refraction" problem and need some help.:?
@lasershark, ahhhhhhhhhhhhhh [screaming] in happiness for you and dread for me. LolI didn't get a call. Are you applying for bachelor's?