Question

A uniform magnetic field acts at right angles to
the direction of motion of electron. As a result,
the electron moves in a circular path of radius
2 cm. If the speed of electron is doubled, then the
radius of the circular path will be
(a) 2.0 cm (b) 0.5 cm
(c) 4.0 cm (d) 1.0 cm

Answer 1

Explanation:

option (c) is correct asr=mv/Bq r is proportional to v r also doubles