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JEE Main 2015 Physics question

PhysicsUnits and MeasurementJEE Main 2015

The period of oscillation of a simple pendulum is . Measured value of L is 20.0 cm, known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using a wristwatch of 1 s resolution. The accuracy in the determination of g is

Answer: (3)

Solution

From , . Here , and

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Question ID VK-115134