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Q.

A train is moving towards north. At one place it turns towards north-east. Here, we observe that:

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a

the radius of curvature of the outer and inner rails will be the same

b

the radius of curvature of one of the rails will be greater

c

the radius of curvature of outer rail will be greater than that of the inner rail

d

the radius of curvature of the inner rail will be greater than that of outer rail

answer is A.

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Detailed Solution

Because the train turns towards north-east, the centripetal force acting on the train must be directed towards south east and the centre of curvature must lie on the line of action of the centripetal force . hence option (1) is correct .

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