Question

A positively charged particle moving due East enters a region of uniform magnetic field directed vertically upwards. This particle will 

(a) more in a circular path with a decreased speed 

(b) move in a circular path with a uniform speed 

(c) get deflected in vertically upward direction 

(d) move in circular path -with an increased speed.

Answer 1

Correct option (b) move in a circular path with a uniform speed 

Explanation:

When a positively charged particle enters in a region of uniform magnetic field, directed vertically upwards, it experiences a centripetal force which will move it in circular path with a uniform speed.