LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Physics by (91.4k points)

Two spheres of the same material have radii 1 m and 4 m and termperatures 4000 K and 2000 K respectively. The ratio of energy radiated per second by the first sphere to that by the second is : 

(a) 1 : 1 

(b) 16 : 1 

(c) 4 : 1 

(d) 1 : 9

1 Answer

+1 vote
by (83.1k points)
selected by
Best answer

Correct option  (a) 1 : 1   


Energy radiated per second by a body which has surface area A at temperature T given by Stefan's law is

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.