## Answers

(1) Force on a charged particle is given by, Fq = q (u xo) where q = charge on the charged - particle ū - Velocity of the charged particle BP = magnetic field Strength. So, option CD) is correct, because the need to - be charged, it must be moving and should not be parallel to B' because if vois parallel to By Tix @ will become Zero. (2) Electron has charge =(-e) e = 1.681019 Velocity is along + axis so, lets say velocity = r î and magnetic field is along -z aris so lets say B = B(-E) so force on it s q cox B) = (-e) (r î x B(-²) eVB iz xis) = = the eVB (-j force will be of along So direction -Y-axis.

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