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two rods of length l 2 each coefficient of linear expantion A 2 are connected freely to a third rod of length l 1 of coefficient opf linear expantion A 1 to form an isoceles triangle ,if the arrangement is supported by a knife edge at ''D'' such that BD=DC THEN ON uniform heating which of relations are not possible? A}AB=AC always B}BD=DC always C}AD is constant if A 1 l 1 2 =4l 2 2 A 2 N ALSO EXPLAIN ME WHT IS MEANT BY KNIFE EDGE

two rods of length l2 each coefficient of linear expantion A2 are connected freely to a third rod of length l1 of coefficient opf linear expantion Ato form an isoceles triangle ,if the arrangement is supported by a knife edge at  ''D'' such that BD=DC THEN ON uniform heating which of relations are not possible?


A}AB=AC always


B}BD=DC always


C}AD is constant if A1l12 =4l22A2


N ALSO EXPLAIN ME WHT IS MEANT BY KNIFE EDGE

Grade:12

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