Advanced Higher Physics 2011 - Questions, Thoughts & Feelings.

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haha woohh!

hmmm even stevens then.. my project went fineish. few mix ups in a few places but all the better for the reflection of the project in analysis. hope to god i get an A after the effort i've put in ha. How'd your project go?

Yeah mine went quite well , did a lot of experiments and made sure to include all the points on the pink sheet.

Reply 121

andrewblackie

ahh right i see. By the way, in those solutions, 1.a)(ii) is most definitely not 2.07ms^-1...that wouldnt give anywhere near enough for relativistic mass.

Reply 122

innerhollow

Original post by andrewblackie

ahh right i see. By the way, in those solutions, 1.a)(ii) is most definitely not 2.07ms^-1...that wouldnt give anywhere near enough for relativistic mass.

Should be 2.07x10^8

I'll check it just now

Edit: Corrected

(edited 12 years ago)

Reply 123

inkwisitive

Original post by innerhollow

COMPLETED SOLUTIONS

Question 8 (Charges in a Magnetic Field)

Spoiler

Re. 8. (c) Are you sure the pitch is greater as well? I know the parallel component of the electron's velocity ( v(cosA) )is greater, but the pitch is equal to (v(cosA) * t) and now the time t is smaller because the radius (mv/qB) is less?

Reply 124

scottbd

For question (2ai), I used th 1/12 in the inertia formula instead of 1/3. Is that wrong physics or is it just lose 1 mark out of the 2?

Reply 125

scottbd

Also, does anybody have the grade boundaries for the last few years?

Reply 126

CHS4

here are the grade boundaries since 2007:
OUT OF 125
2010: A - 87 B - 74 C - 61
2009: A - 87 B - 74 C - 61
2008: A - 86 B - 74 C - 62
2007: A - 87 B - 74 C - 62

Reply 127

scottbd

Original post by CHS4

here are the grade boundaries since 2007:
OUT OF 125
2010: A - 87 B - 74 C - 61
2009: A - 87 B - 74 C - 61
2008: A - 86 B - 74 C - 62
2007: A - 87 B - 74 C - 62

That's great, Thanks! :smile:

Reply 128

innerhollow

That's interesting that grade boundaries have barely changed at all every year for Physics.

Original post by inkwisitive

You had me worried there for a second! However, the period actually remains constant. Although the radius of the circle decreases, the tangential speed at which it is going round the circle also decreases by the same proportion.

T = \displaystyle\frac{2 \pi r}{v_v}

T = \displaystyle \frac{2 \pi r}{v \sin \theta}

T = \displaystyle \frac{2 \pi m v \sin \theta}{v \sin \theta qB}

T = \displaystyle \frac{2 \pi m}{qB}

That final line contains only quantities that are kept constant, so varying the angle of launch or velocity of the electron actually has no effect on the period.

Original post by scottbd

For question (2ai), I used th 1/12 in the inertia formula instead of 1/3. Is that wrong physics or is it just lose 1 mark out of the 2?

I'm afraid you most likely both lose marks for Wrong Physics :frown:

(edited 12 years ago)

Reply 129

fruitfan

I know this is kind of a hard question but whats the average project score ? Thanks

Reply 130

CHS4

see if you go on the sqa web, select subjects, ah physics and go to external assessment reports, you should get it there

Reply 131

jdouglassmith

Average project score is like 14/25. However, this is purely because a lot of people have unconditionals and simply don't put the effort in. I know last years students in my school doing advanced higher had a minimum project mark of 17/25 with a few getting 21/22 too. I wouldn't get disheartened by what national figures are for project scores on the website.