Qualification > Queries
edexcel physics alternative to practical
7ooD:
yes i kno it wasn't hard i was just angry because of the first question of water datz why :D
T.Q:
u can discuss the paper
Black Kitty:
Yeah, u're right, u're talkin about the international written alternative to practicals for as?? I did it as well, it wasnt that hard......However, I had a few doubts, u thnk u can clear them for me??
1. 1st MCQ...the current answer was 20 mA??
2. 3rd MCQ i think....the LDR one...what was the dependent variable?
3. What would be the 3 precautions 4 measuring reaction time?? I've written avoiding paralax error, and keeping the device vertical, but could u clarify this 4 me?
4. How would you draw the ray path through the glass block??
5. The sini/sinr does pass through the origin, right? But how would you explain why?
6. I got the refractive index as 1.59..Some others got it like me, while others got quite diff values like 1.39, 1.48, etc...U think tht's right??
I know its gonna be a pain to ans all this, but jus be concise....Thanks....
7ooD:
1- i did it 10A but then i changed it to 20m dunno wat is the right answer
2- the dependent i did it distance because it changes
3-i did excatly like u lool i said look 90 degrees to avoid parrelex error and use a set square to make sure it is vertical and i said 1 more i dnt remember
4-i said put a ruler under the glass so that we can kno where is the light ray im sure im wrong :P
5-i said if i is 0 then r is 0 then sin0 is 0
6-i got 1.4 :D
T.Q:
--- Quote from: Black Kitty on May 13, 2010, 10:38:34 am ---Yeah, u're right, u're talkin about the international written alternative to practicals for as?? I did it as well, it wasnt that hard......However, I had a few doubts, u thnk u can clear them for me??
1. 1st MCQ...the current answer was 20 mA??
2. 3rd MCQ i think....the LDR one...what was the dependent variable?
3. What would be the 3 precautions 4 measuring reaction time?? I've written avoiding paralax error, and keeping the device vertical, but could u clarify this 4 me?
4. How would you draw the ray path through the glass block??
5. The sini/sinr does pass through the origin, right? But how would you explain why?
6. I got the refractive index as 1.59..Some others got it like me, while others got quite diff values like 1.39, 1.48, etc...U think tht's right??
I know its gonna be a pain to ans all this, but jus be concise....Thanks....
--- End quote ---
dont double post
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