1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Current through voltmeter and ammeter

  1. Jan 1, 2017 #1
    1.JPG
    3. The attempt at a solution

    As temp decreases, the resistance of the thermistor increases...doesn't this mean that the voltmeter will increase too since V=IR?

    I know that the total resistance of the circuit has increased so less current, but I put down option D but the correct answer is A?
     
  2. jcsd
  3. Jan 1, 2017 #2

    gneill

    User Avatar

    Staff: Mentor

    Suppose that the voltmeter and ammeter are ideal and the cell has emf V. If at some moment the thermistor has a resistance R, what voltage would the voltmeter measure across R?
     
  4. Jan 1, 2017 #3

    hilbert2

    User Avatar
    Science Advisor
    Gold Member

    There's never any current through an ideal voltmeter, and never any voltage drop through an ideal ammeter.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Current through voltmeter and ammeter
  1. Ammeter and Voltmeter (Replies: 2)

Loading...