Answer: Understanding Multirange Voltmeter Internal Wiring

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Homework Help Overview

The discussion revolves around understanding the internal wiring of a multirange voltmeter, specifically focusing on calculating the resistances associated with different voltage ranges. The original poster expresses uncertainty about how to approach the problem involving the voltmeter's resistance and its operational principles.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants inquire about the specific requirements of the problem, including the need to find resistances R1, R2, and R3, as well as the overall resistance for different voltage ranges. There is a request for clarity on the problem statement and its components.

Discussion Status

The discussion is ongoing, with participants seeking to clarify the problem's requirements and the original poster's understanding. Some guidance has been offered regarding the need for a complete problem statement, but no consensus has been reached on the approach to take.

Contextual Notes

There is a mention of the need to consider the voltmeter's operational characteristics and the specific voltage ranges it operates within, which may influence the calculations required.

parm09
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Can someone please help me out with this problem? I am not sure if what I am doing

question:
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.

Picutre:
yf_Figure_26_64.jpg


we know v=i/r and Vcoil=IgRcoil

dont know where to begin
 

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What is required in the problem?
 
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
 
Why don't you state the entire text of the problem, verbatum? It should have a question mark somewhere to be answered.
 
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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