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B. Lamp 3 R=100 w V2 + Figure 3.5 Parallel connection of a lamp and a resistor 4) Adjust the power supply to 7.5 (V) volts with the help of a voltmeter. 5) Create a new circuit by connecting the 10022 resistor and the second lamp in parallel as you can see in Figure 3.5. Measure the potential differences V1, V2, V3 as given in Figure 3.5 for the set up circuit. Calculate the average value of the potential difference. Record the results in Table 3.3. 6) Calculate the resistance of the lamp using ohm's law (V=IR). = DR 17.5 Table 3.3 I= 34,14 mA s 0.03414 A Voltage (V) Vi (V) V2(V) Ramb(2) V3 (V) Vave(V) 7.5 7.45 7.44 7.44 7.44 21.9 QUESTIONS 1. The 2002 and 400 22 resistors are connected in parallel with the 20 Volt DC power supply. Find the current flowing through each branch. I. (The branch with power supply)= 12 (Branch with 2002 resistance) = 1; (Branch with 400 22 resistance) = 28
ELECTRONICS SYSTEMS LAB -ЖО. РО. GROUND +V1 ООООООООООООООО 10K 10K 22K 33K ЗК 33x333K SK K4.7K З 10к 56K 100K 10 о Се? C8 080 DG1 X3 обосо 100 X2 X AO GND AVOUT R SCR 150 220 TRC RADIO COUTO 2. Find the equivalent resistance (Rey) and the current ( ? A) passing through the main branch in the circuit below. 1.2 k Ohm Ру 4.3 k Ohm 2.8 k Ohm 1.5k Ohm 3.1 k Ohm M 4.6k Ohrm 36 V 5.5 k Ohm 7.1 k Ohm А Figure 3.6