A point charge q is moving in uniform electric field (E0 in the z-direction) and uniform magnetic field (B0 field in the x-direction). (i) What is the force acting on the charge particle? Find equations of motion for the charge particle. (ii) Assume that initially the charge is placed the origin and has initial velocity (E0/2B0) in the y-direction. Determine position and velocity of the charge particle as a function of time. (iii) Find the trajectory of the particle and sketch path of the charged particle. Explain your results in terms of simple physical picture
a)
Force acting on the particle Fx =q E0 - qvyB0 x
Fy = qvxB0
now given uy = E0/2B0
so
Fx =q E0 - qvyB0 putting in uy = E0/2B0
we get Fx = qE0/2
ax = qE0/2m
so y= uyt
x= axt2/2
putting in the values we get
and
the trajectory is a parabola
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