A uniform magnetic field exists in a region which forms an equilateral triangle of side a. The magnetic field is perpendicular to the plane of the triangle. A charge q enters into this magnetic field perpendicular to a side with speed v.The charge enters from midpoint and leaves the field from $$mid-point$$ of other side. Magnetic induction in the triangle is

Question

Infinity Learn · Accepted Answer

The charged particle moves in a circle of radius $$a/2$$.$$qvB=mv2a/2$$   or   $$B=2mvqa$$

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