Physics-Temperature & Heat
NEET Physics Temperature & Heat MCQ Question
Type: MCQ-numerical-Easy-Class 11
If a metal rod with a thermal conductivity of 400 W m K is used to conduct heat between two points with a temperature difference of 50 K and the rod has a cross-sectional area of 0.01 m² and length of 2 m, what is the rate of heat flow through the rod?
A
1000 W
B
2000 W
C
500 W
D
800 W
Correct Answer
Option B
Detailed Explanation
Using the formula H = KA(T_C - T_D)/L from the NCERT, substitute the given values: K = 400 W m K, A = 0.01 m², T_C - T_D = 50 K, and L = 2 m to find H = 2000 W.
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