Physicsline Exam Q3: Transistor Output - Debating Correct Answer

In summary, the conversation discusses question 3 on page 8 of a physics exam and its corresponding answer on page 8 of the solutions. The question is regarding the DC part of the output signal and how it is affected by the output capacitor. The conversation concludes that the capacitor will remove the DC part if the signal is 0, resulting in a V out of zero.
  • #1
sanado
56
0
The question being referred to is question 3 on page 8:
http://www.itute.com/physicsline/phys_trial_exam1_2008v2.pdf

Answer referred to is Question 3 Area of Study 2:
http://www.itute.com/physicsline/phys_trial_exam1_2008v2sol.pdf

I don't understand why they get this answer. The answer I am getting is the exact same as them except shifted 3V down. This is because the DC part (given from the voltage divider) gives a middle point of 3V and when this is removed by capacitor 2, it will cause the voltage to be -3V? Can someone please explain why i am wrong and if not, why this answer is correct? Any help is appreciated...
 
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  • #2
The output capacitor will remove the DC part of the output signal. If the signal is 0 there is no DC part and the capacitor won't remove anything.
 
  • #3
Okay, so before it enters the final capacitor, would the graph look like a simple straight line, due to clipping. Since this straight line is infact a DC voltage (it doesn't vary) due to the clipping, it is removed by the capacitor and as such, the V out is zero. Is that right?
 

Related to Physicsline Exam Q3: Transistor Output - Debating Correct Answer

1. What is the purpose of a transistor in an electronic circuit?

A transistor is a semiconductor device that is used to amplify or switch electronic signals. It can act as an amplifier by taking a small electrical signal and increasing its strength, or it can act as a switch by controlling the flow of current between two points in a circuit.

2. How does a transistor output work?

A transistor output works by controlling the flow of electrons between two terminals, known as the collector and emitter. This control is achieved by applying a small current to the base terminal, which then allows a larger current to flow between the collector and emitter.

3. What is the difference between a bipolar junction transistor (BJT) and a field-effect transistor (FET)?

The main difference between a BJT and a FET is the way in which they control the flow of current. BJTs use a small amount of current to control a larger current, while FETs use an electric field to control the flow of current. Additionally, BJTs are current-controlled devices, while FETs are voltage-controlled devices.

4. Can transistors be used for both analog and digital circuits?

Yes, transistors can be used in both analog and digital circuits. In analog circuits, transistors are used for amplification and signal processing. In digital circuits, transistors are used as switches to control the flow of current and create logic gates.

5. How do you determine the correct answer for a transistor output question on a physics exam?

To determine the correct answer for a transistor output question, you will need to understand the basic principles of transistors and their operation. You will also need to analyze the given circuit and consider factors such as the transistor type, input and output voltages, and the direction of current flow. It is important to carefully read the question and all of the provided information before selecting an answer.

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