Q.

A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric filed in this region in the horizontal direction. Which of the following options then correctly describe the trajectory of the mass? (Curves are drawn schematically and are not to scale).

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a

b

c

d

answer is C.

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Detailed Solution

Acceleration of particle in x direction  ax=qEMAcceleration of particle in y direction  ay=+gX co-ordinate of particle after time t  x=12qEMt2Y co-ordinate of particles after time t  y=12gt2 yx=MgqE⇒y=MgqEx
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A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric filed in this region in the horizontal direction. Which of the following options then correctly describe the trajectory of the mass? (Curves are drawn schematically and are not to scale).