A uniform magnetic field of magnitude 1 T exists in region y≥ 0 along k^ direction as shown. A particle of charge 1 C is projected from point −3, −1 towards origin with speed 1 m/s. If mass of particle is 1 kg, then co-ordinates of centre of circle in which particle moves are

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1, 3,

1, - 3,

12, −32

32, −12

answer is C.

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Detailed Solution

The centre will be at 'C' as shown:Coordinate of the centre arer cos 600, −r sin 600where r= radius of circle =mvBq = 1 × 11 × 1 = 1i.e., 12, −32

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