Thermistors

• What is the symbol for a thermistor?

  The symbol for a thermistor is shown in the video.
• How does the resistance of a thermistor change with temperature?

  The resistance of a thermistor decreases as the temperature increases.
• What happens to the resistance of a thermistor at low temperatures?

  At low temperatures, the resistance of the thermistor is very high.
• What happens to the resistance of a thermistor at high temperatures?

  At high temperatures, the resistance of the thermistor falls to a low level.
• What are some applications of thermistors?

  • Used in thermostats
  • Used in computers to control cooling fans
  • Used in incubators for premature babies
• How do thermistors function in thermostats?

  Thermistors in thermostats turn devices on or off depending on the temperature.
• What role does a thermistor play in a computer's cooling system?

  A thermistor detects temperature changes and controls the fan speed to cool the computer.
• What happens to the fan speed when the computer gets hot?

  The fan speed increases to cool the computer down when it gets hot.
• What happens to the potential difference across a thermistor when the temperature rises?

  The potential difference across the thermistor becomes very low when the temperature rises.
• How does an incubator for premature babies use a thermistor?

  An incubator uses a thermistor to detect if the temperature falls and activates a lamp and alarm.
• What is the relationship between temperature and resistance in a thermistor?

  • Resistance decreases as temperature increases
  • High resistance at low temperatures
  • Low resistance at high temperatures
• What is the main function of a thermistor in a circuit?

  The main function of a thermistor is to change resistance with temperature variations.