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Homework Help: Multirange Voltmeter

  1. Oct 5, 2009 #1
    Can someone please help me out with this problem? I am not sure if what I am doing

    The figure below shows the internal wiring of a "three-scale" voltmeter whose binding posts are marked , 3.00 V, 15.0 V, and 150 V. When the meter is connected to the circuit being measured, one connection is made to the post marked + and the other to the post marked with the desired voltage range. The resistance of the moving coil is Rg, and a current of I in the coil causes it to deflect full scale.


    we know v=i/r and Vcoil=IgRcoil

    dont know where to begin

    Attached Files:

  2. jcsd
  3. Oct 5, 2009 #2


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    Homework Helper

    What is required in the problem?
  4. Oct 5, 2009 #3
    sorry forgot to mention that. you have to find R1, R2, R3. Also find the overall resistance of the meter on a 3.00, 15.0, 150 V-range
  5. Oct 5, 2009 #4
    Why don't you state the entire text of the problem, verbatum? It should have a question mark somewhere to be answered.
  6. Oct 5, 2009 #5
    What is R1, R2, R3 and what is the overall resistance of the meter on a 3.00, 15.0, 150 V-range? that what its asking
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