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In this Task you are required to devise an experiment to test the validity of both Ohms law and the accuracy of the resistors used in the experiment.

SCHOOL OF ARCHITECTURE, COMPUTING & ENGINEERING

Submission instructions

Cover sheet to be attached to the front of the assignment when submitted All pages to be numbered sequentially

All work has to be presented in a ready to submit state.f

Module code

EG3012

Module title

Engineering Sciences

 Module leader

 

Assignment tutor

Derek Wacey

Assignment title

Coursework Term 1

Assignment number

1

Weighting

50%

Handout date

27th October 2020

Submission date

23.59hrs 5th January 2021 Submission to wacey@uel.ac.uk

Learning outcomes assessed by this assignment

(see course handbook)

 

1-6

Turnitin submission requirement

Yes

Turnitin Grade Mark feedback used?

No

UEL Direct Grade Book submission used?

No

UEL Direct Grade Book feedback used?

No

Other electronic system used?

No

Are submissions / feedback totally electronic?

No

Additional information

ASSESSMENT FEEDBACK - Feedback on your assessment will be available in four working weeks from the submission date. Please refer to the module pages on UEL+ for assessment specific details.

Form of assessment:

√ Individual work        Group work

For group work assessment which requires members to submit both individual and group work aspects for the assignment, the work should be submitted as:

Consolidated single document        Separately by each member

Number of assignment copies required:

√          1                      2                      Other

Assignment to be presented in the following format:

On-line submission √ Glue bound

Spiral bound

Placed in a A4 ring bound folder (not lever arch) Soft copy:

CD (to be attached to the work in an envelope or purpose made wallet adhered to the rear)

USB (to be attached to the work in an envelope or purpose made wallet adhered to the rear)

√  Soft copy not required

Note to all students

All work has to be presented in a ready to submit state when submitted to wacey@uel.ac.uk

An Experiment to determine the resistance values of resistors wired in Series and Parallel

Task 1

In this Task you are required to devise an experiment to test the validity of both Ohms law and the accuracy of the resistors used in the experiment. To this end in Weeks13 to 15 on Moodle is a copy of an Experiment Portfolio you may use an experiment from the Portfolio or from any other source.

All work must be in your own words. Do not use cut and paste for the written text as this will affect your mark. You may use pictures or drawings where you may use cut and paste.

Marks will be awarded for presentation, grammar, spelling, clarity of descriptions and showing good communication skills..

Total marks for Task 1 20 Marks

Task 2

The table below shows the voltage and current values obtained from two experiments using two resistors wired in series and parallel.

The apparatus used was;

A voltmeter, an ammeter, a dc power supply, two resistors 39 ohms and 47 ohms with a 5% tolerance, a breadboard, and cables.

Parallel circuit

Resistors 39 Ohms and 47 ohms 5% tolerance

Table 1

voltage

Current in mA

Total resistance

0.15

033

 

0.18

035

 

0.52

043

 

0.99

055

 

1.11

057

 

1.35

063

 

1.58

070

 

1.78

075

 


A meter reading of the resistance gave 21 ohms

Series Circuit

Resistors 39 Ohms and 47 ohms 5% tolerance

Table 2

voltage

Current in mA

Total resistance

1.42

0.015

 

1.52

0.019

 

2.1

0.025

 

2.34

0.028

 

2.74

0.033

 

3.18

0.038

 

4.01

0.048

 

5.03

0.060

 

5.13

0.064

 


A meter reading gave 85.7 ohms

  1. From the information given in Tables 1 and 2 calculate the individual resistances’ for both series and parallel circuits
  2. From these figures calculate the mean value of the resistances
  3. Using Ohms law and other formulae calculate the theoretical values of the resistances in both circuits..
  4. Explain any differences.
  5. Comment on the accuracy of the experiment and the components used.

30 Marks

Total marks for this assignment 50 2000 to 2500 words in total

Core reading

  • Jim Breithaupt Physics Palgrave Foundations ISBN 978-0-230-23192-4

Recommended

  • Pople S. (2009) AS and A Level Physics Through Diagrams:Oxford Revision Guides, Oxford University Press
  • Akrill T., Bennet G. and Millar C. (2011) Practice in Physics, Hodder Education
  • Gussow M. (1983) Schaum’s outline Basic Electricity, McGraw – Hill
    • Smith P.S. (2001) An Introduction to Structural Mechanics Palgrave Basic Engineering Rayner J. (2010) Engineering Thermodynamics
    • McMullan R. (2012) Environmental Science in Building, Palgrave Macmillan

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