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Homework Help: Current through voltmeter and ammeter

  1. Jan 1, 2017 #1
    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


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    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


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    Science Advisor
    Gold Member

    There's never any current through an ideal voltmeter, and never any voltage drop through an ideal ammeter.
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