Can sum1 plx explain me how to do the question of may/june 2007 P32
Question number 1d
Taking the values of
I=43.4x10^-3
R3=47
y-intercept as = 7
okay, you know that the equation of a straight line is y=mx+c right?
in this case, 1/I is y, R3 is x, (R1+R2/ER2) is m (the gradient) and R1/E is c (the y-intercept)
geddit?
just, next time you have a questino like this (which we will, almost definitely), write y=mx+c above the equation given and see which values match with which.
in this question, substitute the values you got for the gradient and the y-intercept to find R1 and R2.