phy p5 revesion of absolutet errors

[princesszahra]

absolute errors in sum or diffrence

u=x+y or u=x-y
the error in u will be
error in x+error iny


absolute error in product or quotient
u=xy or u=x/y

error of u/ u= +or- ( error of x/x + error of y/y)

absolute error for index form

eg u=x^2 y

error of u/u= +or- ( 2times error of x/x + error of y/y)

error for lg or ln

suppose
I=1.2+or-o.1
Imax=1.3
Imin=1.1

lg of Imax=0.114
lg of Imin=0.0414

error in lg I= ( lgmax - lg min)/2
=(0.114-0.0414)/2
=0.0363
=0.04

error should always be to 1d.p, so the data should also be to 1 d.p
ie error should always be to 1s.f

 

[Sweet_angel]

thnx a lottt.....itzzz really helpful.....

 

[princesszahra]

thnx a lottt.....itzzz really helpful.....

Welcome!