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JEE Main 2013 Physics question

PhysicsUnits and MeasurementJEE Main 2013

If the time period t of the oscillation of a drop of liquid of density d, radius r, vibrating under surface tension s is given by the formula . It is observed that the time period is directly proportional to . The value of b should therefore be :

Answer: (3)

Solution

Since , the powers inside the root must be and : and c = −1. Then . Dimensions: $[s]

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Question ID VK-104075