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A thermostat is an automatic temperature control device widely used in everyday appliances. Option A (To measure temperature) is incorrect — measuring temperature is the function of a thermometer, not a thermostat. A thermostat does sense temperature but its primary function is control, not measurement. Option B (To stabilize and maintain constant temperature) is CORRECT — the image states: थर्मोस्टेट यंत्र के क्या कार्य हैं — तापक्रम का स्थिरीकरण. A thermostat automatically controls heating or cooling equipment to maintain a set temperature. When temperature rises above the set point, the thermostat switches off the heater (or switches on the cooler). It uses a bimetallic strip that bends at a specific temperature to make or break an electrical circuit. Option C (To convert heat into electricity) is incorrect — converting heat to electricity is the function of a thermocouple (Seebeck effect) or thermoelectric generator, not a thermostat. Option D (To transfer heat from cold to hot) is incorrect — transferring heat from a cold body to a hot body (against natural flow) is the function of a refrigerator or heat pump, which requires external work.
FAQ
Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
