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9. 1375: 4:3 (4) 4: 3:2 Four spheres A, B, C and D are of same radius but made of different metals. Their densities are in ratio 6:3 : 4 : 5 and specific heats are in ratio 2: 5:4:6. These are initially kept at the same temperature and placed in the same surroundings. The sphere which has the slowest rate of cooling is :- (1) C (2) B (3) D (45 A square current carrying loop is placed in is 19 n 20A

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