Transmission Of Heat Question 224
Question: At temperature T, the power radiated by a body is Q watts. At the temperature 3T the power radiated by it will be
[MP PET 2000]
Options:
A) 3 Q
B) 9 Q
C) 27 Q
D) 81 Q
Show Answer
Answer:
Correct Answer: D
Solution:
Power radiated $ P\propto T^{4} $
Therefore $ \frac{P _{1}}{P _{2}}={{( \frac{T _{1}}{T _{2}} )}^{4}} $
Therefore $ \frac{Q}{P _{2}}={{( \frac{T}{3T} )}^{4}} $
Therefore $ P _{2}=81Q $
BETA
