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

Internal resistance of a battery lab report

08/12/2021 Client: muhammad11 Deadline: 2 Day

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:

Buy Coursework Help
Academic Master
ECFX Market
A Grade Exams
Finance Homework Help
Instant Homework Helper
Writer Writer Name Offer Chat
Buy Coursework Help

ONLINE

Buy Coursework Help

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$44 Chat With Writer
Academic Master

ONLINE

Academic Master

As per my knowledge I can assist you in writing a perfect Planning, Marketing Research, Business Pitches, Business Proposals, Business Feasibility Reports and Content within your given deadline and budget.

$41 Chat With Writer
ECFX Market

ONLINE

ECFX Market

I am a professional and experienced writer and I have written research reports, proposals, essays, thesis and dissertations on a variety of topics.

$33 Chat With Writer
A Grade Exams

ONLINE

A Grade Exams

I have done dissertations, thesis, reports related to these topics, and I cover all the CHAPTERS accordingly and provide proper updates on the project.

$26 Chat With Writer
Finance Homework Help

ONLINE

Finance Homework Help

I have read your project description carefully and you will get plagiarism free writing according to your requirements. Thank You

$42 Chat With Writer
Instant Homework Helper

ONLINE

Instant Homework Helper

I have read your project description carefully and you will get plagiarism free writing according to your requirements. Thank You

$28 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

Cube root of 35937 - Salford council report it - Addressing Concerns and Myths about Trending Free Ringtones - Using information technology in human services bshs 375 - Trane cvhe performance data - University of bradford academic calendar - A good decision with ethical implications can escalate an emergency into an unmanageable situation. - What are carbon 12 carbon 13 and carbon 14 - How to conjugate er ir and re verbs in french - Example of internal memo proposal - HN521 Discussion 10 - Chapter 16 cost allocation joint products and byproducts - Standard deviation of critical path calculation - Fbi special agent salary - Movie marathon a long division project answers - Distraught definition the giver - Class diagram for sports management system - Http mathworld wolfram com goldenratio html - The chief disadvantage of the shortest processing time rule is - Gladstone street medical clinic - Star wars ccg players committee - Attendance monitoring and payroll system thesis - Uber ethical dilemma - 520 dis - Cloud computing thomas erl pdf - Code of ethics restaurant - When mr pirzada came to dine character analysis - God i look to you - Reflection Paper- Information Systems - Variation of parameters method differential equations - What is the relationship between elasticity and total revenue - Quantitative Evaluation 8381 - Thomas szasz made the controversial assertion that - Morganton company makes one product - Discussion - New zealand postcode finder - Navy equal opportunity program manual assignment 1 - Law exam - Confidence interval for population proportion ti 84 - Was george harrison stabbed - Paper making kit kmart - La trobe grading system - Icd 10 code lumbar facet arthropathy - Erik erikson developmental stages - Jen purchased a condo in naples florida - Movie exhibition industry case analysis questions - Girl [email protected]! BOY FRiend +91-9799046502 Love Marriage Problem Solution Specialist Molvi Ji. - TWO ASSIGNMENTS FOR PSYCH - Https www thebalance com obamacare pros and cons 3306059 - Does vsphere enterprise plus include vcenter - Use of Force - Bsa standard curve protocol - Reading Responses(Less Than 1 Page) - Ikea case study questions - Incident at morales answers - Citizens advice milton keynes - LATE - Continuous quality improvement in nursing examples - Argumentative essay 5 paragraphs - Intentment - Basic Stat HW Ch 7 - Issues in psychological testing worksheet - Density of a gummy bear - Prokaryotic and eukaryotic cell structure worksheet answer key - Bruce dawe the wholly innocent - Industry Analysis Group Project - Eli lilly in india rethinking the joint venture strategy pdf - Agenda Comparison Grid and Fact Sheet or Talking Points Brief - Acu occupational therapy course map - Be glad your nose is on your face pdf - Developmental groove and supplemental groove - The jilting of granny weatherall literary analysis - State v akers case brief - Volume and surface area of shapes - What is equivalent to 10/15 - Bsbmgt617 assessment 2 - Isds 361a - Journal Article Summaries - Functions of language halliday - Memorandum - is noncompete clause enforceable - Write or wrong identity summary - Unsw canberra short courses - Case Study: Mrs. J - John maxwell five levels of leadership - Grand designs incidental music - Estimating unpaid claims using basic techniques - Everglades capstone project - Apple Co - Musyokiones change management - P8 - Review workplace sustainability policy implementation - Consent form for recording interview - Ancient egyptian sky goddess consort of horus - A kitchen poem gwen harwood - Routh hurwitz criterion example - My Favorite Brand - Frederick rathbone burgess traditional kitchenware - Discussion Board - Due in 24 Hours - 300 Words - 2 APA Scholarly References - No Extension - Charlie and the chocolate factory fat kid - Two cars emerge side by side from a tunnel