Unequal expansion of metals makes possible the operation ____?

دھاتوں کی غیر مساوی توسیع آپریشن کو ____ ممکن بناتی ہے؟

Thermostats

Aneroid barometer

Hygrometers

None of these

Thermostats work based on the unequal expansion of metals in a bimetallic strip.

This property helps in regulating temperature by switching devices on or off.