Here is the translation:
We have the grouping of resistors from figure 3.129. Equivalent resistance of the assembly between points A and B is? And what is percentage the first 5 groups of resistances from the equivalent one represent?

Here is the translation We have the grouping of resistors from figure 3129 Equivalent resistance of the assembly between points A and B is And what is percentag class=


Answer :

Answer:

Explanation:

To determine the equivalent resistance of the assembly between points A and B, and to find out the percentage that the first 5 groups of resistances represent from the equivalent resistance, we would typically need to refer to "figure 3.129" which presumably shows the configuration of resistors. Since I don't have access to external images or specific figures, I can provide a general approach on how you might solve this problem:

1. **Calculate the Equivalent Resistance (R_AB)**:

  - Look at the configuration of resistors in figure 3.129. Determine if the resistors are in series, parallel, or a combination of both.

  - Apply the relevant formulas for series and parallel combinations to find the total resistance \( R_{AB} \) between points A and B.

2. **Determine the Resistance of the First 5 Groups**:

  - Identify the resistors that belong to the first 5 groups in the configuration shown in figure 3.129.

  - Calculate the total resistance \( R_{first\_5} \) for these resistors.

3. **Calculate the Percentage**:

  - Once you have \( R_{AB} \) and \( R_{first\_5} \), calculate the percentage that the first 5 groups represent from the total equivalent resistance:

    \[

    \text{Percentage} = \left( \frac{R_{first\_5}}{R_{AB}} \right) \times 100\%

    \]

Without the specific details of figure 3.129, I can't provide numerical values or specific calculations. However, this method outlines the steps you would take to find both the equivalent resistance and the percentage representation of the first 5 groups of resistances. If you can describe the configuration of resistors or provide more specific details from figure 3.129, I can offer more targeted assistance.