Lab-7 (LK) Series Circuit KIT NO. Pushbutton switch 84 Objective LA2 LC 1. Learn to build up a series circuit and a parallel circuit with three resistors and one DC source. 2. Measure current passing through each resistor, and measure the voltage across each resistor. Component spring 3. Verify the equations of series and parallel circuits. Battery Holder Equipment B2 1 EM-8656 AD/DC Electronics Lab Banana PS-3211 Wireless voltage sensor C1 Jacks PS-3212 Wireless current sensor 4 SE-8829 Student Multimeter 5 2 Batteries 6 Wires and Resistors (A) IS. " ..reAILE EN-ESSE ACIDG ELECTRONICS LABORATORY R1 RZ R3 R 10 0 330 100 0 Figure 2: Definition of the names of each spring connector Theory Procedure A: Build a circuit as shown in Figure 1 using Pasco AD/DC Electronics Lab. 1. Check Battery and put two batteries into the Battery Holder The relations for three resistors in series circuits are the following: Use the multimeter to check the values of each battery (battery-1 across BI and B2; and battery- 2 across B3 and B4). The value of each battery should be close to 1.5V. The B2 wire should connect R, = R1 + R2 + R3 (1) to B3 (two batteries connected together), and record the DC voltage between B1 and B4 in the R R- data table. 2 Build a series circuit: AV = AV, + 4V2 + 4V3 ( 3 ) 2.1 B4 wire connects to J4 AV 2.2 B1 wire connects to JB C1 cs Rs: Equivalent resistance of the circuit. Figure 1 2.3 C4 wire connects to C3 2.4 $3 R, connects to $2 R2 Procedures 2.5 C2 wire connects to Cl 2.6 $1 R2 connects to $5 CS cS CB A. Build a series circuit as shown in Figure 1 using Pasco AD/DC Electronics Lab. 2.7 C5 wire connects to Co s5 57 B. Capstone Software and checking the circuit connection. 2.8 $6 R3 connects to $7 C. Data collection and calculations 2.9 C7 wire connects to C8 Figure 3: Circuit connections Using Pasco AD/DC Electronics Lab to build circuits: Procedure B: Capstone Software and checking the circuit connection. The names of each spring connector in the circuit board are shown in Figure 2. In the rectangular areas of Figure 2, the springs are connected in pairs, oriented perpendicular to each other Check whether the total number of wires and resistors in your circuit is 9. If it is not, please check and named C and $. In a given rectangular area, the two springs should be treated equally in circuit connection. For example, connecting to C1 means connecting to $1 also. Therefore the names Cl step A2 (wire between B2 and B3 does not count). and $1 are interchangeable in the following circuit build procedures. Similarly for C2 and $2. 2 Use the multimeter's "voltage function" to measure the voltage across J4 and JB, record this value [AV) in the data table. Disconnect C4 and C3 (remove the wire between C4 and C3). Use the multimeter's "resistance function" to measure the total resistance between $3 and $8, record this value (R,) in the data table.4 Verify equation (1). If your data does not match equation (1), please check Procedure A2 3.4 Insert current sensor between $5 and $6, the sensor will give the current (1,] passing resistor R3- connections. Do not move to the next steps until the verification of equation (1) is passed 3.5 Parallel connect voltage sensor across Ry (across $6 and $7), the sensor will give the voltage Insert current sensor between $4 and $3, the sensor will give the current (1) passing resistor R. [AV3) across resistor R3. 6 Parallel connect the voltage sensor across resistor R, (across $3 and $2), the sensor will gives the 3.6 Open a new page on the Capstone, and open a table, name the "Table title" as "R3 dato" voltage [AV,) across resistor R1 - 3.7 Click the 'RECORD' button. Wait about one second, click the button again to stop recording. 7 Capstone Software and Sensors: Input the current and voltage average values in the data table. 7.1 Turn on the Capstone software. Press the power button on the wireless voltage sensor and Data collection (for Rs) wireless current sensor. The red LED should start blinking. The voltage/current sensor is now ready 4.1 Remove the current sensor and the voltage sensor from the circuit. to connect via Bluetooth. 4.2 Reconnect C5 and C6 by a wire. 7.2 In the "Tools Palette" (on left side of screen) click on "Hardware Setup". This will open the 4.3 Disconnect the wire between C7 and CS. hardware palette. Select the Bluetooth symbol. You should see the voltage/current sensor that 4.4 Insert current sensor between $7 and $8, the sensor will give the current (/) passing all the s visible to Bluetooth to the computer. Select the sensor. Make sure its ID is the same as on the resistors Rs- sensor. 4.5 Parallel connect voltage sensor across $4 and $8, the sensor will give the voltage (AV) across all the resistors Rs- 7.3 Click "Hardware Setup" once again. This will close the hardware palette. 7.4 As the hardware palette closes, the display palette opens up. Double click the "Table" on the 4.6 Open a new page on the Capstone, and open a table, name the "Table title" as "R total data". up-right comer to open a table with two columns. On the left column of the table page, set the "Select Measurement" as current; and on the right column of the table page, set the 4.7 Click the 'RECORD' button. Wait about one second, click the button again to stop recording. Input the current and voltage average values in the data table. "Select Measurement" as voltage 5. Calculate voltages across each resistor by using equation 1, 2, and 3 and enter in the data table. 7.5 At the bottom-lower left of the screen is the "RECORD' button. Once you click it, the system will 6. Calculate the % error between measured voltage and the calculated voltage values in the step 5 start recording the current and voltage on the Table page. It will stop recording when clicked for each resistor. a second time. Click the "E" icon to get the current and voltage average (mean) values. 7. Verify equation 2 and 3. Procedure C: Data collection and calculations ADDITIONAL INFORMATION: 1. Data collection (for R,) 1.1 Refer to Procedure B step 5 and 6, click the 'RECORD' button. Wait about one second, click Video record for the Circuit setup the button again to stop recording. 1.2 Input the current and voltage average values in the data table. Video record for the Pasco Capstone Setup (Series Circuit) 1.3 On the Capstone table page, enter the "Table title here" as "RI data". Take a screenshot of the Capstone data table, and submit it during the lab time. 1.4 Use your camera to take an image of your measurement setup. The image should show the voltage and current sensors, which have the Bluetooth ID. Submit the image during the lab time 2. Data collection (for R2) 2.1 Remove the current sensor and the voltage sensor from the circuit. 2.2 Reconnect C4 and C3 by a wire. 2.3 Disconnect the wire between C2 and C1. 2.4 Insert current sensor between $2 and $1, the sensor will give the current (1,) passing resistor R2- 2.5 Parallel connect voltage sensor across resistor Ry (across $1 and $5), the sensor will give the voltage [AV,) across resistor Rz- 2.6 Open a new page on the Capstone, and open a table, name the "Table title" as "R2 data". 2.7 Click the 'RECORD' button. Wait about one second, click the button again to stop recording. Input the current and voltage average values in the data table. 3. Data collection (for R3) 3.1 Remove the current sensor and the voltage sensor from the circuit. 3.2 Reconnect C2 and CI by a wire. 3.3 Disconnect the wire between C5 and C6.Data Table DC Voltage Source (Voltage across B1 and B4) Voltage across J4 and JB Resistance (0) R 1 R2 R3 Measured equivalent resistant R, (Q) Calculated equivalent resistant Rs (Q) form equation 1 Rs Measured Current (A] Ia I Measured Voltage (V] 4V AV, AV3 AV Calculated Voltage (V) AV, AV2 AV3 AV [Using Equation 1, 2,3 ) Voltage %% error Verify equation (2): 1 = 1 = 12 =1; Verify equation (3): AV = 4V, + AV, + 4V