Question
Question: The energy supply being cut-off, an electric heater element cools down to the temperature of its sur...
The energy supply being cut-off, an electric heater element cools down to the temperature of its surroundings, but it will not cool further because
A
Supply is cut off
B
It is made of metal
C
Surroundings are radiating
D
Element & surroundings have same temp.
Answer
Element & surroundings have same temp.
Explanation
Solution
When element and surrounding have same temperature. There will be no temperature difference, hence heat will not flow from the filament and it’s temperature remains constant.