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Circuits, find the resistance

  • Thread starter Alice7979
  • Start date
  • #1
36
2

Homework Statement


A battery has an emf of V and an internal resistance of r. What resistance R, when connected across the terminals of this battery, will cause the terminal voltage of the battery to be
?
A. r= R
B. R= 4r
C. R= r/4

Homework Equations


V=IR


The Attempt at a Solution


Req= r+R
= V/I' + V/I''
= ? + V/2I''
 

Answers and Replies

  • #2
berkeman
Mentor
56,811
6,778
will cause the terminal voltage of the battery to be
?
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  • #3
36
2
It was supposed to be V/2
 

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