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Homework 4/12
Connor Einstein on Sat Dec 06, 2008 1:27 am
hello how do you work out internal resistance and rand error is it max-min/number 
Connor Einstein- Posts: 16
Join date: 2008-09-04 
Re: Homework 4/12
Suzy on Sun Dec 07, 2008 3:24 pm
The last page - when its a really weird looking graph and asks for frequency?????
Makes no sense to me
Makes no sense to me
Suzy- Posts: 17
Join date: 2008-09-09
Age: 17 -
Homework problems
Admin on Sun Dec 07, 2008 9:07 pm
Connor,
Random error is (max-min)/number, E = IR + Ir R is resistance in heater, E = emf and I = current
Jimmy G
x10-6.
Suzy
Every 5 boxes on the x-axis is 5ms.
How many boxes till the wave repeats itself? Answer 20.
Therefore 1 wave has T = 20 ms.
f = 1/T = 1/20ms = 50 Hz
Brian
If the Heater is in parallel then R is halved so you get
E = IR + Ir and E = I(R/2) + Ir
E and r are fixed so how does I vary?
Random error is (max-min)/number, E = IR + Ir R is resistance in heater, E = emf and I = current
Jimmy G
x10-6.
Suzy
Every 5 boxes on the x-axis is 5ms.
How many boxes till the wave repeats itself? Answer 20.
Therefore 1 wave has T = 20 ms.
f = 1/T = 1/20ms = 50 Hz
Brian
If the Heater is in parallel then R is halved so you get
E = IR + Ir and E = I(R/2) + Ir
E and r are fixed so how does I vary?
Admin- Admin
- Posts: 74
Join date: 2008-09-03
Location: Somewhere -
haha
Scoobasteve on Sun Dec 07, 2008 9:08 pm
what a clever class we have here! 
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Scoobasteve- Posts: 24
Join date: 2008-09-04
Age: 17
Location: Glasgow -
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