Practical Applications of Thermistors and Light Dependent Resistors

This video tutorial covers the practical applications of thermistors and light dependent resistors (LDRs). It begins with a recap of resistors, explaining how they restrict current and convert electrical energy to thermal energy. The video then explores thermistors, which change resistance with temperature, and their applications in devices like thermostats, fire alarms, and fridges. Finally, it discusses LDRs, which alter resistance based on light intensity, and their use in street lights and cameras.

What happens to the energy of electrons as they pass through a resistor?

• It is converted into light energy.

• It is converted into sound energy.

• It remains unchanged.

• It is converted into thermal energy.

How does the resistance of a thermistor change with temperature?

• It decreases with increasing temperature.

• It remains constant regardless of temperature.

• It increases with increasing temperature.

• It fluctuates randomly with temperature.

Which of the following is NOT an application of thermistors?

• Thermostats

• Fire alarms

• Refrigerators

• Solar panels

What happens to the resistance of a light dependent resistor as light intensity increases?

• It remains the same.

• It increases.

• It becomes zero.

• It decreases.

Which device uses light dependent resistors to control its operation?

• Thermostat

• Refrigerator

• Camera

• Fire alarm