Lab 5 excel sheet

Page 1 of 2 1, 2  Next

Go down

Lab 5 excel sheet Empty Lab 5 excel sheet

Post  ahh on Mon Mar 09, 2009 9:42 pm

could anyone pleasee help me calculate the constant on the sheet i've tried so many things and I dont get what im doing wrong. this is what ive been using


(4*pi*k'*N)^2
(2(a^2)(4/5)^3

ahh
Guest


Back to top Go down

Lab 5 excel sheet Empty Constant

Post  Murf on Tue Mar 10, 2009 12:55 am

Hey the equation is : (4*pi'*N)^2 / (2*((5/4)^3)*a^2) you just reversed the 5 and 4 i think.

Murf
Guest


Back to top Go down

Lab 5 excel sheet Empty Sorry!

Post  Murph on Tue Mar 10, 2009 1:16 am

I forgot the k', not pi' but u had that right anyway! whoops

Murph
Guest


Back to top Go down

Lab 5 excel sheet Empty Lab 5 excel sheet - finding constant (answer)

Post  Helping on Tue Mar 10, 2009 1:51 am

constant = ((4*pi*k'*130)^2)/(2((5/4)^3)*(a^2)

where 130 = N (it says it in the lab - this made me go crazy until I actually read the damn thing lol). It turned green in my excel sheet, so it should work in yours! (comes out to a value with E-07).

Helping
Guest


Back to top Go down

Lab 5 excel sheet Empty a & Delta(Ir)^2

Post  cutiepie on Tue Mar 10, 2009 2:45 am

I am not getting a...
I am using a=((a_v1+a_v2)+(a_h1+a_h2))/4
What am I doing wrong?

How do you get Delta(Ir)^2??????????

cutiepie
Guest


Back to top Go down

Lab 5 excel sheet Empty errors...

Post  poop on Tue Mar 10, 2009 1:07 pm

how do u get : error of slope? e/m? error of e/m? error of constant? I have been plugging in so many numbers, nothing is working. thanks!

poop
Guest


Back to top Go down

Lab 5 excel sheet Empty !

Post  someone on Tue Mar 10, 2009 3:39 pm

Error of e/m would be

sqrt((Δconstant/constant)^2+(Δslope/slope)^2)*e/m

someone
Guest


Back to top Go down

Lab 5 excel sheet Empty Re: Lab 5 excel sheet

Post  someone. on Tue Mar 10, 2009 4:02 pm

Ok for the error in slope our TA told us that somthing around 15000 would work (10000 to 20000, somewhere in that range) but for some reason the excel sheet doesnt want to accept that..

Error in the constant = 2*(Δa/a)*constant

e/m = (V/(IR)^2)/constant = slope/constant

someone.
Guest


Back to top Go down

Lab 5 excel sheet Empty textbook value?

Post  lost on Tue Mar 10, 2009 4:57 pm

Does anyone know what textbook value of e/m refers to?

lost
Guest


Back to top Go down

Lab 5 excel sheet Empty error of slope

Post  kate on Tue Mar 10, 2009 5:38 pm

I played around with the error of slope for a bit and found that values between 500-700 seem to fit. If you put in values around there, see which max/min lines fit your error bars the best and that should be your error in slope

kate
Guest


Back to top Go down

Lab 5 excel sheet Empty Textbook Value

Post  Guestttt on Tue Mar 10, 2009 9:42 pm

e/m= charge of electron/mass of electron= (1.6*10^-19)/(9.11*10-31)= 1.76E11 C/kg

Guestttt
Guest


Back to top Go down

Lab 5 excel sheet Empty Error in slope

Post  cutiepie on Tue Mar 10, 2009 10:40 pm

How do you find the error slope? Every1 that is saying plugg-in #'s from 100-700 is WRONGGGGGG. Help me

cutiepie
Guest


Back to top Go down

Lab 5 excel sheet Empty error in slope

Post  guest_01 on Tue Mar 10, 2009 10:53 pm

for error in slope:

(delta(Ir)^2/(Ir)^2) * slope value

guest_01
Guest


Back to top Go down

Lab 5 excel sheet Empty Re: Lab 5 excel sheet

Post  maria on Tue Mar 10, 2009 10:59 pm

Hi

How do u find "a" and "Delta r" plz help Smile

maria
Guest


Back to top Go down

Lab 5 excel sheet Empty mmm

Post  cutiepie on Tue Mar 10, 2009 11:03 pm

what #'s do i plugg-in b/c I tired 2 already and it is not working

cutiepie
Guest


Back to top Go down

Lab 5 excel sheet Empty e/m

Post  guest_01 on Tue Mar 10, 2009 11:05 pm

how do you calculate the e/m value in the excel sheet? the equation in the above post doesnt make sense to me..thanks

guest_01
Guest


Back to top Go down

Lab 5 excel sheet Empty a and delta r

Post  jsyz on Tue Mar 10, 2009 11:30 pm

a =(a_v1+a_v2+a_h1+a_h2)/2/4
delta r=0.002 from the error lab

jsyz

Posts : 7
Join date : 2008-11-24

View user profile

Back to top Go down

Lab 5 excel sheet Empty Re: Lab 5 excel sheet

Post  jsyz on Tue Mar 10, 2009 11:36 pm

e/m= slope/constant
slope you get it from the graph, try putting in the number from the graph Y= Slopex+ number
constant is just (4*pi*(10^-7)*130)^2)/(2*(5/4)^3*(a^2))

jsyz

Posts : 7
Join date : 2008-11-24

View user profile

Back to top Go down

Lab 5 excel sheet Empty Help please!

Post  Help mee on Wed Mar 11, 2009 1:01 am

I still cannot get any of these numbers to turn green!!! e/m, error of slope, error of e/m, error of constant!!! nothing is working!!!

Help mee
Guest


Back to top Go down

Lab 5 excel sheet Empty Slope Error

Post  Need hel on Wed Mar 11, 2009 1:03 am

So I tried everything, from the equation that a previous comment to plugging in about 50 different numbers, lets just say I can not get the Slope Error to save my life.

My slope is 63436, pretty huge to me... What can I do? I really need help with this one, because ABSOLUTELY NOTHING IS WORKING! scratch

Need hel
Guest


Back to top Go down

Lab 5 excel sheet Empty Delta((Ir)^2)

Post  guest21 on Wed Mar 11, 2009 1:24 am

Does anyone know how to find this value?

guest21
Guest


Back to top Go down

Lab 5 excel sheet Empty error in slope?

Post  :) on Wed Mar 11, 2009 2:23 am

someone posted this equation for error in slope:

for error in slope:

(delta(Ir)^2/(Ir)^2) * slope value

but which value of delta(Ir)^2 and which value of (Ir)^2 are you using?

I tried all of them, and tried the average of the max and minimum too with no luck =/

any thoughts, please? thanks Smile

:)
Guest


Back to top Go down

Lab 5 excel sheet Empty execution sheet #1

Post  hello on Wed Mar 11, 2009 2:28 am

hey guys, were you able to get the questions for execution sheet 1?

Look at the sketch of the magnetic field lines due to a single current loop. (See Ch18 sheet 26)
Use that sketch and the sketch below to help explain whether simply doubling the magnetic field of one coil is an under estimate or an over estimate of the magnetic field of interest.


Notice that the correct equation (2) and the incorrect equation differ only by a correction factor of 1/(5/4)^(3/2). When this correction factor is applied to equation does it increase or decrease the field? Does this agree with your answer above?


- for the first one, is it an overestimate because it doesn't account for the doubling of a in the denominator?

- for the second one, the correct equation decreases the field by a factor of 1/(5/4)^(3/2)

I can't tell if my logic is correct o.o

thanks for your time Smile

hello
Guest


Back to top Go down

Lab 5 excel sheet Empty error in slope

Post  guest_01 on Wed Mar 11, 2009 11:49 am

i used the first values off of my excel sheet for both delta(Ir)^2 and (Ir)^2 and multiplied that answer by the value i got for my slope which you get directly off your graph (the # before the "x") ...for me my #s were (.0022/.0121) x 9988 = 1816 --> that is my error in slope..it worked for me so maybe your #s for delta(Ir)^2 and (Ir)^2 aren't correct..check to make sure you did the math right for that before plugging those #s into the error equation.

guest_01
Guest


Back to top Go down

Lab 5 excel sheet Empty delta(Ir)^2

Post  guest_01 on Wed Mar 11, 2009 11:53 am

delta(Ir)^2 was given to you in the lab prep assignment...

sqrt((deltar/r)^2) * (2*(Ir)^2)

guest_01
Guest


Back to top Go down

Lab 5 excel sheet Empty Re: Lab 5 excel sheet

Post  Sponsored content


Sponsored content


Back to top Go down

Page 1 of 2 1, 2  Next

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum