Deliverables: • Turn in a completed and filled copy of this handout on Canvas showing all relevant calculations, data and results (in PDF format). Also turn in an informal report via Canvas in PDF format. Your report shall include the following: 1. Title page. This page must include the title of the assignment, the full names of the team members and date of report completion 2. Introduction 3. Theoretical background 4. Tools and Equipment 5. Procedure 6. Results 7. Discussion 8. Conclusions Note: All answers, calculations, and table data that you have from this assignment, along with experimentally measured values must be distributed among sections 6-8 of the report as appropriate./n Obaid Airamaith: Luis Brave California State University, Fullerton Department of Electrical and Computer Engineering EGEC 203L-08 Electric Circuits Laboratory Assignment 3 Resistance, Voltage and Current measurement-II Submit only copy per team Before submitting, verify that your submitted files are readable Spring 2024 In this lab assignment, you will work in a team of two members and complete the tasks given below: 1. Read the safety and introduction information carefully and thoroughly from the lab manual. Note: Failure to follow safety precautions and/or negligence may result in grade reduction. 2. Assume that a basic meter has Is = 25mA and internal resistance of Rm-3 2. For this meter, ii. iii. Calculate the value of the shunt resistor R, required to convert this meter into an ammeter with I'ts = 60 mA Calculate the value of the multiplier resistor RM required to convert this meter into a voltmeter with V'fs = 2.5V Calculate the value of the multiplier resistor RM required to convert this meter into a voltmeter with V'6=25V Show all the calculations and answers in this report and in your report. IIs Im Is = I-Im = →Is V=0.0750 R==0.015 125 604107 VR = 3 x 25mA = 75mA VRM = V - Vei =75-75mv =75000-75-74.925V I₁ = 60mA Is 25mA 25x10"A V= (25×103) (3) I = 1, - Im = Is 25mA II-Im that can read 2.5V at full-scale. Then, construct a Rm = 74. V = 2097-2 25mA 50x7=8=350 3. Read the resistance of the voltmeter that can voltmeter to read 20V at full-scale i.e. V's = 20V For this voltmeter, adjust the RM value, if necessary, to get the desired full-scale reading and then complete the following table V's Calculated RM Adjusted RM 20V 350 365 K- Demonstrate the working of the constructed voltmeter with V's 20V to the instructor. 4. (Fig. 1) Draw the circuit for determining the value of an unknown resistance Rx using the ammeter-voltmeter method-1 (AV Method-1. In this method, the ammeter is in series with the power supply, resistance Rx is in series with ammeter, and the voltmeter in parallel with resistance R, only). Call this circuit Fig. 1. Derive a formula for calculating the true value 50% of R, using this method for the voltages specified below. Also determine the error of measured value of Rx using this method. i. 2V ii. 10V Rx= R.Ru R+Ry Error-R R+Rv Jo 5. (Fig. 2) Draw the circuit for determining the value of an unknown resistance Rx using the using the ammeter-voltmeter method-2 (AV Method-2. In this method, the ammeter and the resistance Rx are in series with the power supply, and the voltmeter is in parallel with the series connection of ammeter and resistance Rx). Call this Call this circuit Fig. 2. Derive a formula for calculating the true value of Rx using this method for the voltages specified below. Also determine the error of measured value of Rx using this method. i. 2V ii. 10V Rx =Ra+R R Rm Ra+R Ever= Rm = R = 1 Ru+R) = R = R₂ R یہ 7. a. Use the circuit of Fig. 1 with a 2.5V voltage supply to measure current and the voltage across the resistance. Use the voltmeter that you constructed in step 3 (20V full-scale). Record both these current and voltage values. Using these current and voltage values to determine the resistance. b. Now, remove only the voltmeter from this circuit and measure the current. Use this value of current and the voltage recording from step a. above to determine the resistance c. Compare the resistance values obtained in the above steps with the true resistance value. Report the percentage error in each case T-mx100 m Measured Resistance from step A True Resistance 10.0045K Jok Percent Error 004% 10-10.0045 100045 X100-04% Measured Resistance from step B True Resistance Percent Error 10.329 kn 5.02% 10-10-529 10-529 xl00=5.02% a. Use the circuit of Fig. 2 with a 2.5V voltage supply to measure current and the voltage across the resistance. Use the voltmeter that you constructed in step 3 (20V full-scale). Record both these current and voltage values. Using these current and voltage values to determine the resistance. 20.003:10527.89 1-9+1000 b. Now, remove only the voltmeter from this circuit and measure the current. Use this value of current and the voltage recording from step a. above to determine the resistance c. Compare the resistance values obtained in the above steps with the true resistance value. Report the percentage error in each case Measured Resistance from step A True Resistance 10.002K- Пок-2 Percent Error 802% 10-1000? 10.002 1100 = 0.02% Measured Resistance from step B True Resistance 10.kn 10kn Percent Error 0% 8. Which circuit is more accurate for measuring resistance, the circuit in Fig. 1 or the circuit in Fig. 2? Explain your answer. Method 1 is more accurate 9. Does your answer in part 8 above hold good for both high resistance values and low resistance values? Method 2 is not Suitable for small R values Deliverables: Turn in a completed and filled copy of this handout on Canvas showing all relevant calculations, data and results (in PDF format). Also turn in an informal report via Canvas in PDF format. Your report shall include the following: 1. Title page. This page must include the title of the assignment, the full names of the team members and date of report completion 2. Introduction 3. Theoretical background 4. Tools and Equipment 5. Procedure 6. Results 7. Discussion 8. Conclusions Note: All answers, calculations, and table data that you have from this assignment, along with experimentally measured values must be distributed among sections 6-8 of the report as appropriate.

Fig: 1