Question

find the Norton equivalent circuit as seen by the 200 ohm resistor. ​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Thevenin Equivalent Circuits

Introduction

In each of these problems, we are shown a circuit and its Thevenin or Norton equivalent circuit.

The Thevenin and Norton equivalent circuits are described using three parameters: Voc, the open

circuit voltage of the circuit, Isc, the short circuit of the circuit and Rth, the Thevenin resistance of

the circuit. Each problem, asks us to determine the value of asked to determine the value of Voc,

Isc or Rth.

Thevenin equivalent circuits are discussed in Section 5.5 of Introduction to Electric Circuits by

R.C. Dorf and J.A Svoboda. Norton equivalent circuits are discussed in Section 5.6.

Worked Examples

Example 1:

The circuit shown in Figure 1b is the Thevenin equivalent circuit of the circuit shown in Figure

1a. Find the value of the open circuit voltage, Voc and Thevenin resistance, Rth.

Figure 1 The circuit considered in Example 1.

Solution: The circuit from Figure 1a can be reduced to its Thevenin equivalent circuit in four

steps shown in Figure 2a, b, c and d.

A source transformation transforms the series voltage source and 20 Ω resistor in Figure

1a into the parallel current source and 20 Ω resistor in Figure 2a. The current source current is

calculated from the voltage source voltage and resistance as

20 V 1 A

20 = Ω

. After the source

transformation, the 20 Ω resistor is parallel to the 80 Ω resistor. Replacing these parallel resistors

with the equivalent 16 Ω resistor produces the circuit shown in Figure 2b.

2