Transmission Of Heat Question 21
Question: Assertion : Greater is the coefficient of thermal conductivity of a material, smaller is the thermal resistance of a rod of that material. Reason : Thermal resistance is the ratio of temperature difference between the ends of the conductor and rate of flow of heat.
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: B
Solution:
By definition, $ R=\frac{({\theta _{1}}-{\theta _{2}})}{Q/t}=\frac{l}{KA} $
Therefore $ R\propto \frac{1}{K} $ .
BETA
