Question

A thermoelectric refrigerator works on
1. Jules Effect
2. Seebeck Effect
3. Peltier Effect
4. Vernier Effect

Answer 1

Correct Answer - Option 3 : Peltier Effect

The correct answer is Peltier Effect.

• Thermoelectric coolers operate according to the Peltier effect.
  • The effect creates a temperature difference by transferring heat between two electrical junctions.
  • A voltage is applied across joined conductors to create an electric current.

• Joule-Thomson effect is the change in temperature that accompanies the expansion of gas without production of work or transfer of heat.
  • The cooling occurs because work must be done to overcome the long-range attraction between the gas molecules as they move farther apart.
• The Seebeck effect is when electricity is created between a thermocouple when the ends are subjected to a temperature difference between them.
  • The Peltier effect occurs when a temperature difference is created between the junctions by applying a voltage difference across the terminals.
• Vernier effect is a well-known technique in passive systems to extend the FSR of bandpass filters18.
  • Due to the destructive interference, the lasing modes, except for the coupled resonances, are significantly suppressed.