Question

There is a uniform electric field of strength 103 v/m along y-axis. A body of mass 1g and charge 10â6 c is projected into the field from origin along the positive x-axis with a velocity 10m/s. Its speed in m/s after 10s is (neglect gravitation)

Answer 1

Correct Answer: C Solution : Body moves along the parabolic path. E= 10 For vertical motion By using v = u + at Þ -6 10 x 103 QE Vy = 0+ 10-3 For horizontal motion ? It?s %3D horizontal velocity remains the same i.e. after 10 sec, horizontal velocity of body vx = 10 m/sec. Velocity after 10 sec m/se -10/2 c