How to Connect Decade Resistance Boxes in Parallel and Series?

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Homework Help Overview

The discussion revolves around connecting decade resistance boxes in both parallel and series configurations. Participants are exploring the setup used in a lab experiment involving these components, with a focus on understanding the wiring and connections required for proper measurement of current and voltage.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to clarify how to connect multiple decade resistance boxes, specifically questioning the arrangement of terminals and the number of wires needed for each box. There are inquiries about visual aids, such as diagrams, to assist in understanding the setup.

Discussion Status

Some participants have provided guidance on connecting the boxes in parallel, while others are seeking clarification on specific aspects of the wiring, such as the presence of multiple wires on one box. The conversation reflects a mix of interpretations and attempts to visualize the connections.

Contextual Notes

There is mention of using an ammeter and a DC voltage source, but details about the specific decade resistance boxes being used are not fully established. Participants are also exploring how to incorporate different configurations, such as combining parallel and series connections.

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We did a lab with decade resistance boxes. We had to set up three boxes of the same resistance in parallel. However, I am confused as to how to connect the cords. We used an ammeter to measure the current and a dc voltage machine. Can someone please show a diagram on how to hook up the boxes with maybe a picture. I know that on the last box one end of the box had 3 cords in it why?
 
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mopar969 said:
We did a lab with decade resistance boxes. We had to set up three boxes of the same resistance in parallel. However, I am confused as to how to connect the cords. We used an ammeter to measure the current and a dc voltage machine. Can someone please show a diagram on how to hook up the boxes with maybe a picture. I know that on the last box one end of the box had 3 cords in it why?

Can you show us which one you were using?

http://www.google.com/images?hl=en&source=hp&q=resistor+decade+box&gbv=2&aq=f&aqi=&aql=&oq=

.
 
This one:
 

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  • Heathkit model IN-17 decade resistor substitution box 001_sm.jpg
    Heathkit model IN-17 decade resistor substitution box 001_sm.jpg
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mopar969 said:
This one:

So to connect them in parallel, you'd connect all 3 boxes' red terminals together for one side, and all 3 boxes' black terminals toghether for the other side of the resistance. What did you mean about 3 wires on the last box?
 
So then the middle resistor will have two wires on both the red and black terminal and one terminal on each of the other resistors will have two wires for the leads. Is this correct?
 
Then you need to make connections to the power source and to the ammeter.
 
How would the wiring look if there were 2 of the boxes in parallel and one of them in series?
 

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