EET-117_LAB_7_F21[1] (COMPLETED)

School Of Engineering Technology and Applied Science (SETAS) Advanced Manufacturing and Automation Technology (AMAT) EET 117 – Lab Instructions Section : ______009____________ Date: 11/06/23 Lab #7 GROUP : ______1_____________ Parallel Circuits Based on Experiments in Basic Circuits by David Buchla Name : _______TABASSUM SADIA_______________________ Status and Signature : TS Objectives: 1 Demonstrate that the total resistance in a parallel circuit decreases as resistors are added. 2. Compute and measure resistance and currents in parallel circuits. 3. Explain how to troubleshoot parallel circuits. Required Instruments and Components: Power supply DMM (Digital Multi-meter) Breadboard Alligator test leads (from the EET-117 labkit) Resistors: 3.3 kΩ, 4.7 kΩ, 6.8 kΩ, 10.0 kΩ (from the EET-117 labkit)

Procedure 1. Obtain the resistors listed in the Table 1. Measure each resistor and record the measured value in the table. Reminder of steps to measure resistance using lab DMM (reference to the manual): 1. Connect the device under test to the instrument, as shown: 2. Select a resistance measurement function: • Press 2 to select 2-wire ohms. Ω Table 1. Measured and computed resistance values (use 3 significant digits, metric prefixes). Component Listed Value Measured Value Marks R 1 3.3 kΩ 3.26K /1 R 2 4.7 kΩ 4.61K /1 R 3 6.8 kΩ 6.72K /1 R 4 10.0 kΩ 9.84K /1 Total: /4 2. In Table 2 you will tabulate the total resistance as resistors are added in parallel. (Parallel connections are indicated with two parallel lines shown between the resistors.) Enter the measured value of R1 in the table. Then connect R2 in parallel with R1 and measure the total resistance, as shown in Fig. 1. Enter the measured resistance of R 1 in parallel with R 2 in Table 2. Fig. 1 Table 2. Measured and computed resistance values (use 3 significant digits, metric prefixes). R 1 R 1 ||R 2 R 1 ||R 2 ||R 3 R 1 ||R 2 ||R 3 ||R 4 Marks R T (measured) 3.26K 1.91K 1.49K 1.29K /12 I T (measured) 9.26mA /3 Total /15 3. Add R3 in parallel with R1 and R2. Measure the parallel resistance of all three resistors. Then add R4 in parallel with the other resistors and repeat the measurement. Record your results in Table 2. 4. Complete the parallel circuit by adding the voltage source and the ammeter, as shown in Figure 2. Be certain that the ammeter is connected in series with the voltage source, as shown. If you are not sure, have your instructor check your circuit. Measure the total current and record it in Table 2.