(On request - Rajesh)

Q- (a) A positive ion of mass m₁ and charge q₁, initially at rest is accelerated through a potential difference V. Find its speed in terms of given quantities.

(b) The ion than enters a region of uniform magnetic field B, normal to its motion, and moves in a semicircular orbit of radius r. Calculate its radius in terms of given quantities.

 (c) What is the minimum magnitude of the electric field required in the region so that the ion moves in a straight line in the region?

Solution: