1.

A uniform magnetic field of magnitude IT exists in       region y>0 is along k direction as shown. A particle of charge 1 C is projected from point \[(-\sqrt{3},-1)\]  towards origin with speed 1 m/sec. If mass of particle is 1 kg, then co-ordinates of centre of circle in which particle moves are-                

A. \[(1,\,\sqrt{3})\]
B. \[(1,\,-\sqrt{3})\]
C. \[\left( \frac{1}{2},-\frac{\sqrt{3}}{2} \right)\]
D. \[\left( \frac{\sqrt{3}}{2},-\frac{1}{2} \right)\]
Answer» D. \[\left( \frac{\sqrt{3}}{2},-\frac{1}{2} \right)\]


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