A) move in a circular path with a uniform speed.
B) move in a circular path with a decreased speed.
C) move in a circular path with a increased speed.
D) get deflected in a verticle upward direction.
Correct Answer: A
Solution :When the positively charged particels enters in a region of uniform magnetic field, directed vertically upward it experiences centripetal force which will tend to move it in a circular path with an uniform speed.
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