A composite rod made up of two rods AB and BC are joined at B. The rods are of equal length at room temperature and have equal masses. The coefficient of linear expansion a of AB is more than that of BC. The composite rod is suspended horizontal by means of a thread at B. When the rod is heated:

Engineering

Physics

Thermal Expansion

Question

It tilts down on the side of BC

It tilts down on the side of AB

Its centre of mass does not move

It remains horizontal

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τ of weight of rod AB > τ of weight of rod BC about point of suspension

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