Question

A charged particle enter at right angle into a uniform magnetic field . What should be the nature of charge on the particle if it begin to move on a direction pointing vertically out of page due to interaction with the magnetic field

Answer 1

In the case of positive charge, the particle move in a direction vertically out of the page.
Ans: Positive charge

Answer 2

The charge is positive in nature.On applying Fleming's left hand rule,we find that only positive charge will experience a force pointing vertically outwards due to it's interaction with the magnetic field

I hope this helps you