Questions
A) A body of low Thermal capacity gets heated or cooled quickly
B) Good emitters are bad reflectors
detailed solution
Correct option is A
Thermal capacity = ms so when thermal capacity is low, specific heat s should be low. If s is low, from the equation ∆θ=Qms, we conclude that a body gets heated or cooled quickly. So statement (A) is rightτ+r+a=1, for a given τ if 'a' is high, r will be low. Here a = Absorption coefficient, r=reflectivity and τ= transmission coefficient we know, when 'a' is high, 'e' will be high.So statement (B) is right.Talk to our academic expert!
Similar Questions
Consider the following statements.
(A) A body with large reflectivity is a poor emitter of heat radiations.
(B) A body with large reflectivity is a poor absorber of heat.
Select the correct option.
(a) (A) is false but (B) is true.
(b) Both (A) and (B) are true.
(c) (A) is true but (B) is false.
(d) Both (A) and (B) are false.
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
