A community for students.
Here's the question you clicked on:
 0 viewing
rishabh.mission
 3 years ago
Is it correct to say that a potentiometer is equivalent to an ideal voltmeter?
rishabh.mission
 3 years ago
Is it correct to say that a potentiometer is equivalent to an ideal voltmeter?

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0A potentionmeter is basically a device with a variable resistance (see e.g. http://en.wikipedia.org/wiki/Potentiometer ). What should the resistance of an ideal voltmeter be? (Hint: it has to do with the current through the voltmeter)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0A voltmeter requires some current to flow through itself to be able to show some deflection. This would require it to have some resistance.This would change the resistance of the circuit and consequently the current . The potential drops across each of the components of the circuit changes and it is here that the error is produced. For perfect results voltmeter should have infinite resistance and connected parallel across a component. But a infinite resistance voltmeter won't even work. Potentiometer works on null deflection method i.e. when the galvanometer shows zero deflection and since total potential drop in the circuit is zero, we can easily find the potential across a component by knowing the voltage fed(batteries) to the component.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.