A planar lamina is made of thin uniform rods. The length of section AB and EF is $$L1$$ and its coefficient is α$$1$$. The length of CD is $$L2$$ and its coefficient is α$$2$$. CB and DE are of same length having coefficient α$$1$$α$$2=3.5$$ Points A, B, E and F reside on the same line that is sections AB and EF overlap. Then find the ratio of $$l2l1$$ for which the distance between end A and end F remain same at all temperatures

Question

A planar lamina is made of thin uniform rods. The length of section AB and EF is $$L1$$ and its coefficient is α$$1$$. The length of CD is $$L2$$ and its coefficient is α$$2$$. CB and DE are of same length having coefficient α$$1$$α$$2=3.5$$ Points A, B, E and F reside on the same line that is sections AB and EF overlap. Then find the ratio of $$l2l1$$ for which the distance between end A and end F remain same at all temperatures

Infinity Learn · Accepted Answer

Since AF is constant, where $$L1$$ $$=$$ EB and $$L2$$ $$=$$ CD

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