Magnetic field due to currentHard
Question
A particle of specified charge (q/m) is projected from the origin of coordinates with initial velocity [uî + vĵ]. Uniform electric magnetic fields exists in the region along the +y direction, of magnitude E and B. The particle will definitely return to the origin once if
Options
A.
is an integer
is an integer B.(u2 + v2)1/2 
is an integer
is an integerC.
in an integer
in an integerD.
in an integer
in an integerSolution
T = 
(Time period of rotation)
For motion in E.F
s = ut +
at2 ⇒ 0 = vt - 
t2
⇒ t =
= nT n = 
= An integer
(Time period of rotation) For motion in E.F
s = ut +
at2 ⇒ 0 = vt - t2⇒ t =
= nT n = = An integerCreate a free account to view solution
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