Please provide a decent amount of words as an answer. Thank you. 5.5 Questions 1

Question

Please provide a decent amount of words as an answer. Thank you.
5.5 Questions 1. If you had measured Vr by u sing a common voltmeter instead of using the slide wire po tiometer, what difference would you expect? 2. Was there any detectable shift in the EMF or the internal resis e potentiometer setting with the standard cell after each se long, the others short? d with short leads havin measurements of the same battery? of 3. Why is it advisable to recheck th measurements? For be measured were connected with longer leadsaving culation of Ex using Eq. 5.5? Which is more 6. Compare your values of E, and r for the new and old batteries. Which one of these varies more 4. Would the measurements be affected if some of the leads were example, what would change if the standard cell were connecte total resistance of 0.05 , and the cell a total resistance of 0.15 ? 5. Using the voltage from the power h roe supply (Vab), and your measured values of x, calculate an from Eq. 5.3. Is this value the same as your other cal accurate and why? n for this. Write the answers on the Data Sheet.

Explanation / Answer

1, common voltmeter doesn't give the actual voltage being used. So terminal voltage would be equal to EMF if we had measured it using common voltmeter.

2. Yes, a shift will be observed because with time the battery undergoes a chemical process which may affect the EMF or internal resistance.

3. Because the Value of internal resistance depends on correct insertion or we can say correct setting of potentiometer.

4. As given in the question, the resistance is different for short and long wire.so yes it is obvious that measurements will be affected by the use of short and long leads

5. From the given equations and data I think that equation 5.3 is more viable because in this equation potential is directly proportional to distance x.

6. It all depends on chemical process undergoing in a battery. As it is comparatively faster in old batteries, so Ex and r will vary more in old batteries.

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