061021

Question : A charged particle is fired with velocity v through a space having both electric and magnetic field E and B respectively. In which of the following cases, the charge will go undeflected?
a) E and B becomes 2E and 2B respectively.
b) EB
c) E||Bv
d) none of the above.

Doubt by Jayant

Ans : a) is the correct answer.

Solution : Detailed solution is coming soon.