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Asked: 2020-04-04T04:20:51+05:30 In:

GATE MT 2015 Q59. The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2=0.1 R1, the corresponding driving force ΔG2=αG1, where α is _____.

GATE MT 2015 Q59. The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2=0.1 R1, the corresponding driving force ΔG2=αG1, where α is _____.
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      Correct answer is 10. We know that driving force is inversely proportional to radius. ΔG∝ 1/R ⇒ ΔG1R 2= ΔG2R 1 As per question, α=ΔG2/ΔG1 = R 1/R 2 = R 1/0.1 R 2 = 10  

      Correct answer is 10.

      We know that driving force is inversely proportional to radius.

      ΔG∝ 1/R ⇒ ΔG1R 2= ΔG2R 1

      As per question, α=ΔG2/ΔG1 = R 1/R 2 = R 1/0.1 R 2 = 10

       

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