Q. 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.
Explanation
(d) 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
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.