Questions
Two ends of rods of length L and radius r of the same material are kept at the same temperature. Which of the following rods conducts most heat ?
a
L = 50 cm, r = 1 cm
b
L = 100 cm, r = 2 cm
c
L = 25 cm, r = 0.5 cm
d
L = 75 cm, r = 1.5-cm
detailed solution
Correct option is B
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Water can be heated in a cup of paper because:
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