MCQ
Relation between emissivity $e$ and absorptive power $a$ is (for black body)
- ✓$e = a$
- B$e = \frac{1}{a}$
- C$e = {a^2}$
- D$a = {e^2}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

