Thermistors

• How does the resistance of a thermistor change with temperature?

  Resistance decreases as temperature increases
• What is one application of a thermistor?

  Used in thermostats
• What are the characteristics of light dependent resistors (LDRs)?

  • High resistance in dark conditions
  • Low resistance in light conditions
  • Found in devices like garden lamps
• What happens to the resistance of a thermistor at low temperatures?

  Resistance is very high
• What happens to the resistance of a thermistor at high temperatures?

  Resistance falls to a low level
• How does a thermistor function in a computer's cooling system?

  It controls the fan based on temperature
• What occurs when the temperature of a computer rises?

  The fan switches on to cool it down
• How does the potential difference across a thermistor change with temperature?

  It decreases as temperature increases
• What happens to the potential difference across the fan when the thermistor's resistance decreases?

  Potential difference across the fan increases
• What is the role of a thermistor in an incubator for premature babies?

  It detects temperature drops to activate alarms
• What are the key functions of a thermistor in various applications?

  • Senses temperature changes
  • Controls devices like fans and alarms
  • Used in incubators and thermostats
• What is the relationship between the potential difference and the speed of the fan in a computer?

  Higher potential difference increases fan speed