Q: Two ends of rods of length L and radius r of the same material are kept at the same temperature difference. Which of the following rod conducts most heat- दो छड़ों, जिनकी लम्बाई l तथा त्रिज्या r है, और जो समान पदार्थ से बनी है, के सिरे समान तापान्तर पर रखे हैं। निम्न में कौन-सी छड़ सबसे अधिक उष्मा संचरित करेगी-
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
Correct Answer:
Option B -
Explanations:
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