AS level Physics Practicals

[Merdons Wolfman]

hi.
i need help in my physics practical calculations...
Q1d) => 9702/31/M/J/09 and Q1f&g) 9702/31/M/J/08
thankx in advance.

 

[sse2010]

for jun09
since the graph plotted is of 1/I against R n the given relationship is 1/I=R/P + Q/P...therfore 1/P wud be the gradient of the graph n Q/P wud be the y-intercept which u can eithr find directly frm the graph or calculate using da formula y=mx+c

 

[Merdons Wolfman]

i'm stuck on how to find Q/P.

 

[MAVtKnmJ]

Have you calculated the gradient? If so just plug it in along-with a value of y and x into the equation y=mx+c to calculate the y-intercept. Where are you having a problem?

 

[Merdons Wolfman]

i have found the Y-intercept and gradient.
i just tell me the way/steps to find P&Q :mrgreen:

 

[MAVtKnmJ]

Have you had no practice with such equations before? I am not going to spoon feed you but I will help you do this.

How many past papers have you done so far for Physics Practicals?

 

[Merdons Wolfman]

4 or 5 may be.

 

[MAVtKnmJ]

That's your problem, are you expecting to score good in this paper? I doubt it, it's a Practical, meaning most of it should have been done previously in Practice.

Anyways, go through the papers which you have done and see how you manipulated the given relation/formula to match y=mx+c

If you still need help then show me your working and I will help!