• Support PF! Buy your school textbooks, materials and every day products Here!

Potentiometer Resistance

  • Thread starter tanky322
  • Start date
  • #1
43
0

Homework Statement


In the circuit below, the wiper divides the potentiometer resistance between [tex]\alpha R[/tex] and[tex]\ (1- alpha R)[/tex], 0 [tex]\leq[/tex][tex]\alpha[/tex] [tex]\geq 1[/tex]. Find Vo / Vs

Schematic1.jpg



Homework Equations



KVL
KCL



The Attempt at a Solution



Im thinking that the Pot. Resistance will be R +(1-[tex]\alpha[/tex])R. Then to find the voltage (R +(1-[tex]\alpha[/tex])R)I
 

Attachments

Answers and Replies

  • #2
mgb_phys
Science Advisor
Homework Helper
7,774
12
You can ignore the resistance of the main part of the pot to ground that is below the wiper because it is in parallel with a short circuit.
The resitance of the pot is simply, R - alphaR = R(1-alpha)
 
  • #3
43
0
So would the answer be:

(([tex]\Sigma[/tex]R)/I)Vs


Sorry about the formatting, I need to learn how to use the system.


Thanks


Andrew
 

Related Threads for: Potentiometer Resistance

Replies
9
Views
11K
Replies
2
Views
1K
Replies
1
Views
827
Replies
38
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
8K
  • Last Post
Replies
14
Views
1K
  • Last Post
Replies
7
Views
2K
Top