EASY
11th West Bengal Board
IMPORTANT
Earn 100

Define emissive power? State its unit.

Important Questions on Heat Transfer

EASY
11th West Bengal Board
IMPORTANT
Define absorptive power? State its unit?
EASY
11th West Bengal Board
IMPORTANT
What are the absorptive power and reflecting power of a perfectly black body?
HARD
11th West Bengal Board
IMPORTANT
Why thermal radiations are emitted by all bodies at any temperature above absolute zero?
EASY
11th West Bengal Board
IMPORTANT
What is the relation between absorptive power and reflective power of a material?
EASY
11th West Bengal Board
IMPORTANT
State Kirchhoff's law of radiation.
EASY
11th West Bengal Board
IMPORTANT
What is emissivity of a substance?
EASY
11th West Bengal Board
IMPORTANT
What is total radiation emitted by a body? How total radiation emitted by a body per second depend on its temperature?
MEDIUM
11th West Bengal Board
IMPORTANT
Temperature of a black body is increased 300 K to 600 K. How much the total radiation emitted per second does change?