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What material were the spheres made up of in Henry Cavendish’s experiment?

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in Physics – Class 11 by (74.2k points)
What material were the spheres made up of in Henry Cavendish’s experiment?

(a) Lead

(b) Steel

(c) Iron

(d) Wood

This question was posed to me in examination.

Question is taken from The Gravitational Constant topic in section Gravitation of Physics – Class 11

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Best answer
Right option is (a) Lead

Explanation: Henry Cavendish used lead spheres in his experiment because lead was easily available at the time. Iron was also abundantly available. However, Henry Cavendish chose lead because it is denser than iron and the mass of lead is about 44% higher than that of iron for the same size of the sphere – this would lead to a larger gravitational force which is easier to measure.

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