### Potentiometer Circuit Measurement**Diagram Explanation:**The diagram depicts a circuit using a potentiometer to measure the voltage \( V_m \). In the circuit:- \( V_s \) represents the source voltage.- \( L \) is the total length of the potentiometer.- \( R \) is the resistance wire of the potentiometer.- \( R_x \) is the variable section of the resistance wire.- An ammeter (A) is connected in series to measure current \( I_G \).- \( V_m \) is the voltage across resistor \( R_m \).**Question 2: [5 Points]**A potentiometer is used to measure the voltage \( V_m \) as shown in the circuit above. \( L \) is the length of the potentiometer, and \( x \) is the length of resistance up to the contact point when the measurement is ready to be taken.(a) **Conditions for Measurement:** - What conditions are required for a measurement to be taken? - Does this place the system in null or deflection mode for the measurement?(b) **Calculation of \( V_m \):** - How is \( V_m \) calculated from the measured length \( x \)? Provide a mathematical expression. - No written explanation is required.

a. To make the measurement of unknown voltage Vm The ammeter must show 0A reading For more accuracy…

A potentiometer is to be used to measure the voltage Vm as shown above. L is the length of the potentiometer and x is the length of resistance to the contact point when the measurement is ready to be taken.

A potentiometer is to be used to measure the voltage Vm as shown above. L is the length of the potentiometer and x is the length of resistance to the contact point when the measurement is ready to be taken.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

### Potentiometer Circuit Measurement

**Diagram Explanation:**
The diagram depicts a circuit using a potentiometer to measure the voltage \( V_m \). In the circuit:

- \( V_s \) represents the source voltage.
- \( L \) is the total length of the potentiometer.
- \( R \) is the resistance wire of the potentiometer.
- \( R_x \) is the variable section of the resistance wire.
- An ammeter (A) is connected in series to measure current \( I_G \).
- \( V_m \) is the voltage across resistor \( R_m \).

**Question 2: [5 Points]**

A potentiometer is used to measure the voltage \( V_m \) as shown in the circuit above. \( L \) is the length of the potentiometer, and \( x \) is the length of resistance up to the contact point when the measurement is ready to be taken.

(a) **Conditions for Measurement:**
- What conditions are required for a measurement to be taken?
- Does this place the system in null or deflection mode for the measurement?

(b) **Calculation of \( V_m \):**
- How is \( V_m \) calculated from the measured length \( x \)? Provide a mathematical expression.
- No written explanation is required.

Expert Solution

Step 1

To make the measurement of unknown voltage Vm

The ammeter must show 0A reading
For more accuracy of measurement, the ammeter should be very sensitive.
The ammeter should have no deflection and it must be at null point represents zero current.

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