Q7 of 27 Page 77

The radius of a metal sphere at room temperature T is R, and the coefficient of linear expansion of the metal is α. The sphere is heated a little by a temperature ∆T so that its new temperature T is (T + ∆T). The increase in the volume of the sphere is approximately

As we know the volume of sphere

Also given in question that coefficient of linear expansion is also coefficient of cubical expansion


So



Option (d) is matching hence correct option is (d).

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Mark the correct options: