DC Circuits

winetediousElectronics - Devices

Oct 7, 2013 (3 years and 8 months ago)

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DC Circuits

Notes:


Record the values of your resistors.


R
1

= ___________________


R
2

= ___________________



Part 1
: Build the circuit






a) Vary V from 0 V to 25 V (roughly equal spacing), recording the current and voltage for each.



b) Plot
V ve
rsus I on paper or in Excel. From your graph determine what the resistance value R is.



c) Calculate the % difference of this value of R from the value recoded at the top of the page.





Part 2
: Build the circuit






a) Vary V from 0 V to 25 V (rou
ghly equal spacing), recording the current and voltage for each.



b) Plot V versus I on paper or in Excel. From your graph determine what the
equivalent resistance seen
by the voltage supply
.



c) Calculate the % difference
of this value from the value

you expect from the

recoded
resistances
at
the top

of the page
.

Show your calculation of this equivalent resistance.





Part 3
: Build the circuit








a) Vary V from 0 V to 25 V (roughly equal spacing), recording
al three

current
s

and
the
voltage f
or each.


b) Do the three currents “add up” correctly? How do you tell?


c
) Plot V versus I

(for the voltage supply)

on paper or in Excel. From your graph determine what the
equivalent resistance seen by the voltage supply.


d
) Calculate the % differe
nce of this value from the value you expect from the recoded resistances at
the top of the page.

Show your calculation of this equivalent resistance.



Q1:















Explain.




Q2: