JEE Advanced 2021 Full Test 2 Paper 2

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SECTION – B (Single Digit Integer Type)
This section contains 06 questions. The answer to each question is a Single Digit integer ranging from 0 to 9, both inclusive.

Question : 9 of 54

Marks: +1, -0

A ball of mass of mass 10−2kg and having a charge +3×10−6C is tied at one end of a 1m long thread. The other end of the thread is fixed and a charge −3×10−6C is placed at this end. The ball can move in a circular orbit of radius 1m in the vertical plane. Initially, the ball is at the bottom. Find minimum initial horizontal velocity of the ball so that it will be able to complete the full circle.

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