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As a charged particle q movinga velocity vec(v) enters a uniform magnetic field vec(B). It experiences a force vec(f) = q (vec(v) xx vec(B)) For theta = 0^(@) or 180^(@), theta being the angle between vec(v) and vec(B). Force experienced is zero and particle passes undeflected. For theta = 90^(@), the particle moves along a circule are and the magnetic force (qvB) provides the necessary centripetal force ((mv^(2))/(r )). For other values of theta (theta != 0^(@), 180^(@), 90^(@)), the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions. suppose a particle that carries a charge of magnitude q and has a mass 4 xx 10^(-15) kg. is moving in a region containing a uniform magnetic field vec(B) = - 0.4 hat(k)T. At a certain instant , velocity of the particle is vec(v) = (8hat(i) - 6 hat(j) + 4 hat(k)) xx 10^(6) m/s and force acting on it has a magnitude 1.6 N Which of the three components of acceleration have non-zero values ?

Answer»

X and y
y and z
z and x
x,y and z

Answer :A


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