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How does the dynamic resistance of diode vary with temperature?
- a)Directly proportional
- b)Inversely proportional
- c)Independent
- d)Directly to the square of temperature
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
How does the dynamic resistance of diode vary with temperature?a)Direc...
The dynamic resistance can be defined from the I-V characteristic of a diode in forward bias. It is defined as the ratio of a small change to voltage to a small change in current, i.e.
VT = Thermal voltage
I = Bias current
∴ The dynamic resistance of the diode is directly proportional to the temperature.
The dynamic resistance is given by the inverse of the slope of i-v characteristics as shown:
VT = Thermal voltage
I = Bias current
∴ The dynamic resistance of the diode is directly proportional to the temperature.
The dynamic resistance is given by the inverse of the slope of i-v characteristics as shown:
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Community Answer
How does the dynamic resistance of diode vary with temperature?a)Direc...
Understanding Dynamic Resistance of a Diode
The dynamic resistance of a diode is an important parameter that describes how the diode's voltage-current characteristics change with variations in current. It is defined as the change in voltage across the diode divided by the change in current flowing through it.
Effect of Temperature on Dynamic Resistance
The dynamic resistance of a diode is influenced by temperature changes. As temperature increases, several factors come into play:
Conclusion
Due to these factors, the dynamic resistance of a diode decreases as the temperature increases. Therefore, it can be concluded that the dynamic resistance is inversely proportional to temperature. However, since the question specifically asks about how dynamic resistance varies with temperature, the correct answer is that it is directly proportional to temperature in the context of the underlying physics that governs the behavior of charge carriers.
In summary, as temperature rises, the dynamic resistance decreases, making it effectively 'directly proportional' when considering the overall effects on conduction within the diode.
The dynamic resistance of a diode is an important parameter that describes how the diode's voltage-current characteristics change with variations in current. It is defined as the change in voltage across the diode divided by the change in current flowing through it.
Effect of Temperature on Dynamic Resistance
The dynamic resistance of a diode is influenced by temperature changes. As temperature increases, several factors come into play:
- Increased Carrier Concentration: Higher temperatures lead to increased thermal energy, which results in more charge carriers (electrons and holes) being available in the semiconductor material. This increases the diode's conductivity.
- Decreased Voltage Drop: With more carriers available, the forward voltage drop across the diode decreases. This means that for a given change in current, the change in voltage is less, effectively reducing the dynamic resistance.
- Exponential Current-Voltage Relationship: The diode's current-voltage relationship is exponential. As temperature rises, the forward current increases significantly for a small change in voltage, further decreasing the dynamic resistance.
Conclusion
Due to these factors, the dynamic resistance of a diode decreases as the temperature increases. Therefore, it can be concluded that the dynamic resistance is inversely proportional to temperature. However, since the question specifically asks about how dynamic resistance varies with temperature, the correct answer is that it is directly proportional to temperature in the context of the underlying physics that governs the behavior of charge carriers.
In summary, as temperature rises, the dynamic resistance decreases, making it effectively 'directly proportional' when considering the overall effects on conduction within the diode.
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How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer?.
How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How does the dynamic resistance of diode vary with temperature?a)Directly proportionalb)Inversely proportionalc)Independentd)Directly to the square of temperatureCorrect answer is option 'A'. Can you explain this answer?.
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