vi. Apply 3V DC to your circuit network and measure the current through each resistor vii. Verify Kirchhoff s Current Law

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1 Lab Experiment No. EE1106, Fall 201 Connections I. Introduction In this lab exercise, you will learn how to read schematic diagrams of electronic networks, how to transform schematics into actual element connections, correct ways to layout a breadboard connection of a network, how to use the NI MyDQ for circuit measurements to verify Ohm s Law and Kirchhoff s Laws, and how to combine resistors to establish terminal equivalence. II. Pre-Lab ssignement Perform all the calculations for the Calculated Value listed on the tables. II. Experiment Procedure collection of resistive networks are given in Figures 1 through 6. The schematic diagram of the network is shown in (a) while the resistor connection is shown in (b) in each Figure. Obtain from the lab GT all of the resistors required for these experiments. Use these resistors to correctly layout each of these networks on your breadboard. U to take measurements and make calculations required to fill out the tables provided with each network. Use specified and calculated values as the basis for percentage variations. (a) Series connection. series connection of resistors is shown in Figure 1. The schematic diagram of this connection is shown in Figure 1(a) while the actual resistor connection is shown in Figure 1(b). Fill out Table 1 with data obtained below. i. Measure the of each resistor in the series connection. ii. With the specified resistor value as the basis, calculate resistor variations in per-cent. iii. Calculate the value of the at the terminals -. This is the terminal. iv. pply the DMM to measure. v. Calculate the variation in in. vi. Calculate the circuit Current vii. pply V DC to your circuit network and verify Ohms Law. (b) Parallel connection. parallel connection of resistors is shown in Figure 2. The schematic diagram of this connection is shown in Figure 2(a) while actual resistor connection is shown in Figure 2(b). Fill out Table 2 with data obtained below. i. Measure the of each resistor in the parallel connection. ii. With the specified resistor value as the basis, calculate resistor variations in per-cent. iii. Calculate the value of the at the terminals -. This is the terminal. iv. pply the DMM to measure. v. Calculate the variation in in. vi. pply V DC to your circuit network and measure the current through each resistor vii. Verify Kirchhoff s Current Law (c) Series/parallel combination. series connection of parallel resistors is shown in Figure. The schematic diagram of this connection is shown in Figure (a) while the actual resistor connection is shown in Figure (b). Fill out Table with data obtained below. i. Measure the of each resistor in the connection. ii. With the specified resistor value as the basis, calculate resistor variations in per-cent. iii. Calculate the value of the resistor that will produce a terminal of 8Ω. iv. Obtain this resistor from the lab GT and connect it into the network. v. pply the DMM to measure. vi. Calculate the variation in from 8Ω in.

2 (d) Parallel/series combination. parallel connection of series resistors is shown in Figure. The schematic diagram of this connection is shown in Figure (a) while the actual resistor connection is shown in Figure (b). Fill out Table with data obtained below. i. Measure the of each resistor in the connection. ii. With the specified resistor value as the basis, calculate resistor variations in per-cent. iii. Calculate the value of the resistor that will produce a terminal of 1.8KΩ. iv. Obtain this resistor from the lab GT and connect it into the network. v. pply the DMM to measure. vi. Calculate the variation in from 1.2KΩ in. (e) Combination 1 (Combo 1) connection. combination connection of resistors in series and parallel is shown in Figure 5. The schematic diagram of this connection is shown in Figure 5(a) while the actual resistor connection is shown in Figures 5(b). Fill out Table 5 with data obtained below. i. Measure the of each resistor in the connection. ii. With the specified resistor value as the basis, calculate the resistor variation in per-cent. iii. Calculate the value of the at the terminals -. This is the terminal. iv. pply the DMM to measure. v. Calculate the variation in in. (f) Combination 2 (Combo 2) connection. Yet another combination connection of resistors in series and parallel is shown in Figure 6. The schematic diagram of this connection is shown in Figure 6(a) while the actual resistor connection is shown in Figures 6(b). Fill out Table 6 with data obtained below. i. Measure the of each resistor in the connection. ii. With the specified resistor value as the basis, calculate the resistor variation in per-cent. iii. Calculate the value of the at the terminals -. This is the terminal. iv. pply the DMM to measure. v. Calculate the variation in in. III. Lab Report The report for this lab experiment must be word-processed and contain the following items Title Page. Introduction. Procedure. Results. Discussions. (a) Suggest useful applications for the connections studied in this experiment. Conclusion. Provide detailed comments and discussions on the items listed below for each resistor network. (a) re all resistors within tolerance? List those that are not. (b) ccount for the difference between measured and calculated (that is, the calculated variation or tolerance of R). (c) Explain how the variation in corresponds to resistor tolerance. (d) Explain how close the calculated values of in the series/parallel and parallel/series connections are to standard resistor values. Consider resistor tolerance. ppendix. References.

3 Series Connection + V 1.9K 2K 2 5.1K + V K 1.2K - (a) (b) Figure 1 (a) Schematic for the series connection Table 1 Series connection Voltage (V) Calculated (V) Measured (V).9K 2K 5.1K 1.2K 8.2K Calculated value Circuit Current Calculated Value () Measured Value ()

4 Parallel Connection + V + V 10K 7.5K 15K.K 2.2K - - (a) Figure 2 (a) Schematic for the parallel connection (b) Table 2 Parallel connection Calculated () Current () Measured () 10K 7.5K 15K.K 2.2K Calculated value Current () Current ()

5 Series/Parallel Connection (a) Figure (a) Schematic for the series/parallel connection (b) Table Series/parallel connection

6 Parallel/Series Connection.0K 7.5K 1.5K 2 6.2K K K 5.6K 8.2K 6 9.1K 6 (a) Figure (a) Schematic for the parallel/series connection (b) Table Parallel/series connection 1.5K 1.2K K 2.7K 5.6K 7.5K 6.2K 8.2K 9.1K 1.8K

7 Combo 1 Connection K 5.6K 1.2K 1.8K 1 1K K R.K K K 6 1K 7 1.K 2.2K 2.2K K Figure 5 (a) Schematic for Combo 1 connection

8 Table 5 Combo 1 connection K.6K 1.2K 1.8K 1.K 2.2K 2.2K 1.2K K 2 1.5K K 1K 5 2K 6 1K Calculated value

9 Combo 2 connection 7K 1 120K 10K 150K 0K 100K 2 7 0K K 5 15K 20K 00K 5 8 0K 2 15K 6 75K 15K 22K 6 Figure 6 (a) Schematic for Combo 2 connection

10 Table 6 Combo 2 connection 7K 0K 120K 20K 0K 15K 0K 22K 10K 0 00K 1 100K 2 15K 100K 150K 5 15K 6 75K Calculated value