- #1
Physicist3
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On a graph where Ic is plotted against Vce for a range of base currents, does the line represent the load resistance (Rc)?
In summary, the conversation discusses the representation of load resistance (Rc) on a graph where Ic is plotted against Vce for a range of base currents. The participants also mention the usefulness of a Google Images search for finding relevant information quickly.
- #2
berkeman
Mentor
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Physicist3 said:
Which line?
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/ietron/loadline3.gif
- #3
Physicist3
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berkeman said:
Sorry, meant to say load line but missed the word out the question by mistake. That's quite a good diagram btw
- #4
berkeman
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Yeah, definitely a helpful drawing. BTW, I found it very quickly by using a Google Images search on transistor load line. I like Google Images searches for many tasks, because they can get you to what you want much faster than sifting through a bunch of hyperlink hits from a regular Google search.
- #5
alphysicist
Homework Helper
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No, the line on the graph does not represent the load resistance (Rc). The line on the graph represents the relationship between collector current (Ic) and collector-emitter voltage (Vce) for a range of base currents. The load resistance (Rc) is a fixed value in the circuit and does not change with varying base currents. The graph is used to analyze the characteristics of a transistor and determine its operating region.
FAQ: Plotting Rc on an Ic vs Vce Graph
What is the purpose of plotting Rc on an Ic vs Vce graph?
The purpose of plotting Rc on an Ic vs Vce graph is to study the relationship between the collector current (Ic) and the collector-emitter voltage (Vce) in a transistor circuit. This graph can help us understand the behavior of the transistor and its characteristics, such as the saturation region, active region, and cutoff region.
How is Rc determined on an Ic vs Vce graph?
Rc (collector resistance) is determined by measuring the slope of the Ic vs Vce curve. The slope of this curve represents the inverse of the collector resistance, so the steeper the slope, the lower the collector resistance. This can be calculated by taking the change in collector current over the change in collector-emitter voltage.
How does the value of Rc affect the Ic vs Vce graph?
The value of Rc affects the shape of the Ic vs Vce graph. A lower value of Rc will result in a steeper slope, indicating a higher collector current for a given collector-emitter voltage. On the other hand, a higher value of Rc will result in a flatter slope, indicating a lower collector current for a given collector-emitter voltage.
What does the intersection of Ic and Vce represent on the graph?
The intersection of Ic and Vce on the graph represents the operating point of the transistor. This point indicates the values of collector current and collector-emitter voltage that the transistor is operating at. It is important to choose the appropriate operating point to ensure the transistor is not damaged and is functioning correctly.
How can the Ic vs Vce graph be used to analyze the stability of a transistor circuit?
The Ic vs Vce graph can be used to analyze the stability of a transistor circuit by observing the changes in the graph when there are variations in the input voltage or temperature. If the graph remains consistent, the transistor circuit can be considered stable. However, if there are significant changes in the graph, it may indicate instability and the need for further analysis or adjustments to the circuit.