BK Precision 4011A Instrucciones de operaciones descargar pdf (Pagina 29)

Laboratory 6: Problems: Circuit Analysis Methods

201017

Superposition Principle (from Rizzoni’s text):

In a linear circuit containing N sources, each branch voltage and current is the sum of N

voltages and currents, each of which may be computed by setting all but one source equal

to zero and solving the circuit containing that single source.

Thévenin’s equivalent circuit (from Rizzoni’s text):

When viewed from the load, any network composed of ideal voltage and current sources,

and of linear resistors, may be represented by an equivalent circuit consisting of an ideal

voltage source v

in series with an equivalent resistance R

Thévenin’s equivalent resistance

1. Remove the load.

2. Zero all independent voltage and current sources.

3. Compute the total resistance between load terminals, with the load removed. This re-

sistance is equivalent to that which would be encountered by a current source con-

nected to the circuit in place of the load.

Thévenin voltage

The equivalent Thévenin voltage source is equal to the open-circuit voltage present at the

load terminals (with the load removed).

1. Remove the load, leaving the load terminals open-circuited.

2. Define the open-circuit voltage v

across the open load terminals.

3. Apply any preferred method (e.g., nodal analysis) to solve for v

4. The Thévenin voltage is v

= v

Pre-Lab Problems: Work the following problems before coming to lab.

1. In the circuit below, find the current through the 200Ω resistor by:

a) using mesh analysis

b) using nodal analysis

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BK Precision 4011A Instrucciones de operaciones Pagina 29