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NEET 2000 Physics question

PhysicsMoving Charges and MagnetismNEET 2000

A charge having equal to and with velocity enters into a uniform magnetic field tesla at an angle with direction of field. Then radius of curvature will be :

Answer: (2)

Solution

Only the velocity component perpendicular to the field, , produces circular motion; the parallel component gives a uniform drift along the field (helical path). Radius: \frac{mv_\perp}{qB}\fracExtra open brace or missing close brace{v\sin$

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Question ID VK-088558