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Which of the following is correct for thermistors?
- a)Positive temperature coefficient of resistance
- b)Negative temperature coefficient of resistance
- c)Unpredictable temperature coefficient
- d)None of the mentioned
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is correct for thermistors?a)Positive temperat...
For thermistors, as temperature increases, resistance decreases.
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Which of the following is correct for thermistors?a)Positive temperat...
Understanding Thermistors
Thermistors are temperature-sensitive resistors whose resistance changes significantly with temperature variations. They are widely used in temperature sensing and control applications.
Types of Thermistors
- Negative Temperature Coefficient (NTC) Thermistors:
- The most common type of thermistor.
- Resistance decreases as temperature increases.
- Useful in temperature measurement and compensation due to their predictable behavior.
- Positive Temperature Coefficient (PTC) Thermistors:
- Resistance increases with an increase in temperature.
- Often used in overcurrent protection and as resettable fuses.
Why Option B is Correct
- Dominance of NTC Thermistors:
- In most applications, NTC thermistors are favored; hence the term "thermistor" usually refers to them.
- Predictable Behavior:
- NTC thermistors provide a linear or semi-linear response to temperature changes, making them reliable for precise temperature measurements.
- Applications:
- Common in digital thermometers, temperature sensors in HVAC systems, and battery management systems.
Conclusion
Understanding that thermistors primarily have a negative temperature coefficient of resistance is crucial. This characteristic allows them to serve effectively in a variety of temperature sensing applications. Option B, therefore, accurately reflects the fundamental nature of thermistors, making it the correct answer.
Thermistors are temperature-sensitive resistors whose resistance changes significantly with temperature variations. They are widely used in temperature sensing and control applications.
Types of Thermistors
- Negative Temperature Coefficient (NTC) Thermistors:
- The most common type of thermistor.
- Resistance decreases as temperature increases.
- Useful in temperature measurement and compensation due to their predictable behavior.
- Positive Temperature Coefficient (PTC) Thermistors:
- Resistance increases with an increase in temperature.
- Often used in overcurrent protection and as resettable fuses.
Why Option B is Correct
- Dominance of NTC Thermistors:
- In most applications, NTC thermistors are favored; hence the term "thermistor" usually refers to them.
- Predictable Behavior:
- NTC thermistors provide a linear or semi-linear response to temperature changes, making them reliable for precise temperature measurements.
- Applications:
- Common in digital thermometers, temperature sensors in HVAC systems, and battery management systems.
Conclusion
Understanding that thermistors primarily have a negative temperature coefficient of resistance is crucial. This characteristic allows them to serve effectively in a variety of temperature sensing applications. Option B, therefore, accurately reflects the fundamental nature of thermistors, making it the correct answer.
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Which of the following is correct for thermistors?a)Positive temperature coefficient of resistanceb)Negative temperature coefficient of resistancec)Unpredictable temperature coefficientd)None of the mentionedCorrect answer is option 'B'. Can you explain this answer?
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