Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Practical connection assignment

06/01/2021 Client: saad24vbs Deadline: 7 Days

Experiment 5


The Slide Wire Potentiometer


Abstract:


In this experiment, we are going to calculate the Electromotive force and the internal resistance for the three unknown batteries. Also, our goal is to calculate the average and Standard deviation of these three unknown batteries and do a comparison for the E.M.F and Internal Resistance for the three unknown batteries which are Old Battery, New battery, and Daniel Cell. Afterwards, we will calculate the uncertainty for the two cases (E.M.F. & Internal Resistance) for the unknowns. We expect our results for E.M.F for the three unknowns to be somewhat close to each other. For calculating E.M.F (and internal resistance “r” for these three battery cells, we used equation that are explained in the introduction.


Introduction:


We are going to observe how much or the maximum Voltage the three unknown batteries can have which is the Electromotive Force of a battery. As well we are going to observe and calculate the Internal Resistance for these three unknowns by changing the current in the battery and resistance. Refer to the equations for better understanding:


Electromotive force >> or 2)


Either one can be used to calculate the Electromotive force. Basically in equation 1 stands for Electromotive force for the standard cell, “x” stands for the length we measure for our unknowns (either New, Old, or Daniel cell) and “S” stands for the length for the standard cell. On the other hand, in equation 2 the “X” stands for length we measure for the three unknown, and stands for the voltage we set obtained from the Power supply.


Internal Resistance >>


“r” is the internal resistance for any of the three unknowns, stands for Electromotive force for our unknown batteries stands for terminal voltage which we obtain using the following equation: (x) and is the current (Amps) we calculate using this equation: I= Ω. In our Daniel cell, we used 50 Ω as our standard resistor because we were have trouble using 20 Ω.


Procedure:


Step 1: We assembled our circuit according to figure 1, and we measured “S” length (cm) for the standard cell using a slide wire and get the reading for the length when the galvanometer reads zero current (just like we did in experiment 4). We did it 4 times, or 4 runs.


Step 2: We connected our new battery to slide wire potentiometer, then we turned our switch towards the New battery instead of the standard cell and we did the same Procedure as step 1 to the length “X” using uniform slide wire so we can calculate the Electromotive force for these unknowns. In addition we prepared the solutions for the Daniel cell which is copper sulfate and zinc sulfate. We did the same procedure for the Old battery and Daniel cell.


Step 3: We got our calibrated standard resistor of 20Ohms, and we connected it to our circuit instead of so we can calculate the internal resistance for these three unknowns. We got our length “X” for our new battery using the uniform slide wire. We did the same procedure for Old battery, and Daniel Cell.


Apparatus:


Slide wire potentiometer, galvanometer (protective resistance), knife switch DPDT, standard cell, new 1.5 volt dry cell, old 1.5 dry cell, decade resistor box, Daniel cell, copper sulfate, and zinc sulfate.


Data:


· The e.m.f listed on the standard cell E = 1.01912 V


· The voltage of the power supply VAB = 2.0 V


a. New Battery:


· The balance position of the standard cell s = 55.0 cm


Length X (Centimeters) for Dry Cell


Length X(cm) for Loaded Dry Cell


Run 1


74.2


73.3


Run 2


77.2


75.0


Run 3


73.9


75.9


Run 4


76.1


73.6


Run 5


74.4


74.4


b. Old Battery:


· The balance position of the standard cell s = 53.3 cm


Length X (Centimeters) for Old Dry Cell


Length X (cm) for Loaded Old Dry Cell


Run 1


77.6


5.4


Run 2


77.4


6.6


Run 3


75.2


6.3


Run 4


77.7


6.2


Run 5


77.3


5.3


c. Daniel cell:


· The balance position of the standard cell s = 54.2 cm


Length X (Centimeters)for Daniel Cell


Length X(cm) for Loaded Daniel Cell


Run 1


54.5


33.5


Run 2


57.2


34.3


Run 3


56.4


34.9


Run 4


55.6


34.2


Run 5


55.5


35.2


Calculations:


· New Dry Cell:


x (cm)


xt (cm)


I (A)


r (Ω)


74.2


73.3


1.37


1.36


0.0679


0.246


77.2


75.0


1.43


1.39


0.0695


0.587


73.9


75.9


1.37


1.41


0.0703


-0.527


76.1


73.6


1.41


1.36


0.0682


0.679


74.6


74.4


1.38


1.38


0.0689


0.0538


· Old Dry Cell:


x (cm)


xt (cm)


I (A)


r (Ω)


77.6


5.4


1.48


0.103


0.00516


267


77.4


6.6


1.48


0.126


0.00631


215


75.2


6.3


1.44


0.120


0.00602


219


77.7


6.2


1.49


0.119


0.00593


231


77.3


5.3


1.48


0.101


0.00507


272


· Daniell Cell:



x (cm)


xt (cm)


I (A)


r (Ω)


54.5


33.5


1.02


0.630


0.0315


12.5


57.2


34.3


1.08


0.645


0.0322


13.4


56.4


34.9


1.06


0.656


0.0328


12.3


55.6


34.3


1.05


0.645


0.0322


12.4


55.5


35.2


1.04


0.662


0.0331


11.5


Conclusion:


The Experiment went as expected. We had a little disagreement, we expected the Electromotive force on the New battery to be higher than the E.M.F of the Old battery, although they are pretty much close (not that big of a difference). The reason for that is common sense, a “New battery” will have higher E.M.F. (max volts) in a circuit, than an old battery which is constantly used. Also, for our internal resistance we were satisfied since our internal resistance for our Old battery was much higher than the internal resistance for the new battery; in which we expected that since Internal resistance for a dry cell rises as the battery ages. While E.M.F pretty much stays the same.


Questions:


1, If we use a voltmeter we would have a different measurement for our voltage, because when using voltmeter we would have current flowing through the battery. While in slide wire potentiometer is adjusted in which no current flow through (terminal voltage) or Vt would give more accuracy when calculating the electromotive force. Therefore, the measured potential would be higher that the potential goes through the potentiometer.


2, Yes, we experienced quite a shift for the internal resistance in the New battery and Daniel cell, especially Old battery.


3, It is advisable to recheck the potentiometer because the standard cell has an average e.m.f. Es at 200C marked on each cell. The variation of Es with temperature in the 200C to 300C range is negligible compared to the errors inherent in the used of the slide wire used in this laboratory.


4, Yes, the measurements would get effected if the leads were long or short. We would have a different values for the internal resistance for the unknowns. Because to calculate internal resistance we depended on Vt and I in which I = Vt / 20 according to our lab manual. So if you change the 20 Ohms to different value, you would obtain different values for the internal resistance for the three unknowns.


5, Yes, the values are almost the same for E.M.F using equation 3 and using equation 5. However, equation 5 is probably more accurate since you are using the length “S” and E.M.F for the standard battery also.


For the New battery using equation 3: 74.2cm () = 1.48 Volts


For the New battery using equation 5: = 1.01912V( ) = 1.37 Volts


6, Comparing the values for and “r” from our analysis, we see that “r” (internal resistance) varies more as the battery ages. The reason is because the internal resistance increases as the battery becomes old because as battery gets old, chemicals inside the battery resist any current flowing inside of the battery resulting in higher Internal resistance.


I = 1.36 20


= 0.0679A


I=


1.36


20


=0.0679A


r = 1.37−1.36 0.0679


= 0.147Ω


r=


1.37-1.36


0.0679


=0.147W


)


(


V


X


e


)


(


V


V


T


εx = 1.37+1.43+1.37+1.41+1.38


5 =1.39V


e


x


=


1.37+1.43+1.37+1.41+1.38


5


=1.39V


σεX = (1.36−1.39)2 +...+ (1.38−1.39)2


5−1 = 0.03V


se


X


=


(1.36-1.39)


2


+...+(1.38-1.39)


2


5-1


=0.03V


r = 0.246+...+ 0.0538 5


= 0.208Ω


r=


0.246+...+0.0538


5


=0.208W


σ r = (0.246− 0.208) 2 +...+ (0.0538− 0.208)2


5−1 = 0.5


sr=


(0.246-0.208)


2


+...+(0.0538-0.208)


2


5-1


=0.5


Ω


W


)


(


V


X


e


)


(


V


V


T


εx =1.47V


e


x


=1.47V


σεX = 0.02V


se


X


=0.02V


r = 241Ω


r=241W


σ r = 27V


sr=27V


)


(


V


X


e


)


(


V


V


T


εx =1.05V


e


x


=1.05V


σεX = 0.02V


se


X


=0.02V


r =12.4Ω


r=12.4W


σ r = 0.6V


sr=0.6V


εX =1.01912× 74.2 55.0


=1.37V


e


X


=1.01912´


74.2


55.0


=1.37V


VT =1.01912× 73.3 55.0


=1.36V


V


T


=1.01912´


73.3


55.0


=1.36V

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Helping Hand
Top Essay Tutor
University Coursework Help
Writer Writer Name Offer Chat
Helping Hand

ONLINE

Helping Hand

I am an Academic writer with 10 years of experience. As an Academic writer, my aim is to generate unique content without Plagiarism as per the client’s requirements.

$140 Chat With Writer
Top Essay Tutor

ONLINE

Top Essay Tutor

I have more than 12 years of experience in managing online classes, exams, and quizzes on different websites like; Connect, McGraw-Hill, and Blackboard. I always provide a guarantee to my clients for their grades.

$145 Chat With Writer
University Coursework Help

ONLINE

University Coursework Help

Hi dear, I am ready to do your homework in a reasonable price.

$142 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Siklu default ip address - Australasian dental practice magazine - Effective Teams - Thought Responses - 0.00004 in standard form - Standards based lesson plan format template - Martin luther king presentation ideas - Effect of chemical germicides on bacterial growth - Rabbit proof fence introduction - 2020 economics hsc exam - An example of channel stuffing would be - Management principles for health professionals answers - MEMO - Camp millowski - Great gatsby study guide answers - Biased and unbiased samples activity - Dental burs study guide - Reply to this discussion - benjamin - Bcg women's cheer layout shoes - Literary periods in the philippines - Evidence-Based Practice Case Study. - Arranger of holidays crossword climber - Kung fu panda name - How to get gre score above 300 - Kitchen utensils and equipment and their uses - A storage tank containing oil sg - Fife council rubbish uplift - Charlemagne had the most profound influence on which continent - 150 centre road langwarrin - Bt graduate software engineer - Simile in romeo and juliet act 1 - Zimmer knee replacement mri protocol - Bubaran udan mas - What is virtualization in cloud computing wikipedia - Lossing-barrett - Compare and evaluate in 500 words or more qualitative v quantitative risk assessment. - Reaction of potassium iodide with silver nitrate - Bonaire pyrox premium power flued 30 wall furnace - ERM 6 - N 3 3 and 5i are zeros f 1 104 - Servant leadership and followership similarities army - Cnc milling machine wiki - 1o mins quiz for econ - A well insulated heat exchanger is to heat water - Anatomy - Information system of coca cola company - Army training centre pirbright - How to make a coreless dc motor - Organic vs conventional farming pros and cons - Where was i answers brian smith - Junior vikatan breaking news - Disney marketing case study - Forbidden caverns reviews - Paul's nerang mechanical workshop - Eyeglassomatic manufactures eyeglasses for different retailers - Bursting the antibacterial bubble - Geo 3030 - Tintern abbey poem shmoop - How does the saguaro cactus survive in the desert - Personal marketing plan example pdf - Cosmic creation myths across cultures - Ax 2012 management reporter - In rogerian therapy, the _____ is responsible for discovering maladaptive patterns. - Bend it like beckham punjabi song - PSYC 209 - 1638 - Haywood academy show my homework - BUS 687 Week 1 pt 2 - Https www mindtools com pages article newcs_99 htm - Petition to remove union steward - Sacred and profane love meaning - Grand canyon university 5 mission competencies - I need care plan about anorexia - Week 5 Discussion - Physics olympiad past papers - Homework in R - IT PROJECT ANALYSIS AND PROPOSAL - Brenda paz ms 13 - 1998 french film about post impressionist painter - 120 pearl river road - Kotter’s 8-Step Change Model Chart - Storm the castle com - Psychology and life zimbardo pdf - Lectures on urban economics brueckner exercise solutions - Importance of Becoming a Global Citizen - M6: Discussion: Children in Juvenile Court - ISSC341 - Brother coca cola commercial - Models and theories of planned change - Who were the essenes and zealots - Aws autoscaling health check grace period - Writing help - Research design by creswell 4th edition pdf - Sri lanka public sector accounting standards - Eastern shore chainsaws and mowers - HRM - Intwerview - Https atiam train army mil catalog - Aleks accounting cycle answers - How to use excel qm - The telegram iain crichton smith short story - Non consumable items in science lab - As nzs 5033 pdf download