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

Voltage Divider

  • #1
200
0

Homework Statement



How do you measure the output of a voltage divider with real voltmeters that have effective resistances

Homework Equations





The Attempt at a Solution



I know that for an ideal voltmeter (one with infinite resistance), the voltage divider is R2/(R1+R2), but I don't know what to do when the voltmeters have effective resistances. Any help would be great!
 

Answers and Replies

  • #2
9
0
Instead of considering the voltmeter as an effective "open circuit" at the point of measurement, which is equivalent to an infinite paralel resistance, substitute it for (i.e. model it as) a finite resistance, say Rv.
 

Related Threads on Voltage Divider

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
8
Views
557
  • Last Post
Replies
8
Views
853
  • Last Post
Replies
9
Views
2K
  • Last Post
Replies
3
Views
2K
Replies
1
Views
1K
  • Last Post
Replies
1
Views
2K
Top