multisim 14.0.1 circuit

ENRG 2140 Lab Activity 3a, Multisim

Superposition and Thevenin’s Theorem

Scored out of 10 as part of your Lab Grade.

This is an individual Lab, but you may get assistance from others if needed.

Procedure:

Open Multisim Software

Program Files -> National Instruments (folder) -> Circuit Design Suite -> Multisim

On every Design sheet from the top menu “Place” find “Text” and write your:

Name

ENGR 2140A

Date

YOU WILL LOSE POINTS FOR EVERY CIRCUIT IMAGE THAT DOES NOT HAVE THIS

Superposition

· Make a circuit as shown with two voltage sources and two current sources and five resistors. Choose Voltages between 1 and 12 Volts, Currents between 1 and 12 milliAmperes (mA) and Resistances between 1 kOhm and 100 kOhm. All source values will be positive, but you must match the direction for the components so that you have one in each direction .

· Record the values chosen in the table below. Assume Voltage and Current sources are ideal and have no internal resistance; Multisim will do this as a default.

· With all sources active, measure the voltage across each resistor and the current through each resistor (you will need two indicators or multimeters for each resistor or 10 measurement devices total).

YOU MAY LOSE POINTS ON THE LAB REPORT IF YOU DO NOT SHOW THE INSTRUCTOR THAT YOU HAVE COMPLETED THE LAB UP TO THIS POINT BEFORE YOU LEAVE THE CLASSROOM.

· Then, follow the rules for superposition and evaluate the circuit with only one source in it at a time. This means replacing unwanted batteries with wires and making current sources into open circuits. Start with only E1 and fill in the table. You will have to make a new circuit for every source, which only contains one active source. Make sure you save a picture of each circuit with only one source, as well as a picture with all sources. There is a place at the end of the lab to paste each picture.

Table 1 Circuit Component Values: Insert Chosen Values Here

	E1 (V)	E2 (V)	I1 (mA)	I2 (mA)	R1 (kΩ)	R2 (kΩ)	R3 (kΩ)	R4 (kΩ)	RLoad (kΩ)
Values Chosen

Table 2 Superposition Data, PAY ATTENTION TO DIRECTION (+/-)

	Voltage	Current	Did you save a picture?
	R1	R2	R3	R4	RLoad	R1	R2	R3	R4	RLoad
All Sources
E1 Only
E2 Only
I1 Only
I2 Only

Describe how you would experimentally measure the Thevenin Eth and Rth values for this circuit and save a picture of the measurement for Eth and Rth.

Description of process:

Eth value:

Rth value:

Questions.

1. In your own words, explain superposition.

2. How does the data in the table support the superposition Theorem? (Hint: If you measured correctly, in each column of Table 2, the sum of the data in rows 2, 3, 4, and 5 should equal the value of the data in row 1. If it does not, you may want to check your circuit and correct the measurements.)

Insert 7 Circuit Pictures here with YOUR NAME AND DATE VISIBLE ON THE CIRCUIT.

1. All Sources

2. E1 Only

3. E2 Only

4. I1 Only

5. I2 Only

6. Eth being measured

7. Rth being measured