Question

only write a conclusion/lesson learnt based off the experiment

(iry After performing this experiment, you will be able to: I. Change a linear network containing several resistors into an nt Thevenin circuit. circuit by comparing the 2. Prove the equivalency of the network in objective 1 with the effects of various load resistors. Materials Needed: Resistors: One 150 Ω, one 270 Ω, one 470 Ω, one 560 Ω, one 680 Ω, one 820 Ω One 1 k2 potentiometer Summary of Theory: in experiment 9, you solved series-parallel circuits by developing equivalent circuits. Equivalent circuits simplify the task of solving for current and voltage in a network. The concept ot circuits is basic to solving many problens in electronics. equivalent Thevenin's theorem provides a means of reducing a complicated, linear network into an equivalent circuit when there are two terminals of special interest (usually the output). The equivalent Thevenin circuit is composed of a voltage source and a series resistor. (In ac circuits, the resistor may be represented by opposition to ac called impedance.) Imagine a complicated network containing multiple voltage sources, current sources, and resistors such as that shown in Figure 11-1(a). Thevenin's theorem can reduce this to the equivalent circuit shown in Figure 11-1(b). The circuit in Figure ll-1(b)is caled a Thevenin circuit. lu device connected to the ouiput is a load for the Thevenin circuit. The two circuits have identical responses to any load! TH Figune 11-1 Two steps are required in order to simplify a circuit to its equivalent Thevenin circuit. The first step is to measure or compute the voltage at the terminals of interest with any load resistors removed. This open-circuit voltage is the Thevenin voltage. The second step is to compute the resistance seen at the same open terminals if sources are repaced with their internal resistance. For voltage sources, the internal resistance is usually taken as zero and for current sources the intemal resistance is infinite (open circuit). An example of this process is illustrated in Figure 11-2. TH -Look in from output terminals Pigme 11-2

Answer 1