MPSC Rajyaseva 2025 GS Paper 1 — Question 51
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एकाच पदार्थाच्या दोन रॉडच्या लांबी त्रिजेचे गुणोत्तर 1 : 2 आणि 2 : 3 आहे. जर रॉडच्या दोन्ही टोकांमधील तापमानातील फरक समान असेल तर उष्णता प्रवाहाचे गुणोत्तर किती असेल ? The ratio of lengths to radii of two rods of same material is 1 : 2 and 2 : 3. If temperature difference between two ends of the rod is same, then what will be the ratio of heat flow ?
1)3 : 2
2)4 : 3
3)1 : 3
4)8 : 9✓ Correct
Heat flow formula Q = (KA Delta T)/L. Since material is same, K is constant. Using radii ratios and length ratios, the heat flow ratio calculates to 8 : 9.
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