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Paragraph: A uniform disc of mass m and radius R is made up of two halves, one half has charge +Q uniformly distributed over it & another half has charge -Q uniformly distributed over it. This system is kept on rough surface in a uniform horizonal field E in a way so that line of seperation become parallel to field, system is released from rest, at t =0 as shown in figure. Question: Acceleration of centre of the disc

Options

  1. A4 QE 9 ~m
  2. B8 QE 9 ~m
  3. C16 QE 9 ~m
  4. D2 QE 3 ~m

Correct answer

C. 16 QE 9 ~m

Step-by-step solution

_ net = I ; _ electric - F _ r R = I From the equation of translatory motion f_r=m a 8 Q R E 3 -m a R= mR ^2 2 a R By solving above equation a = 16 QE 9 ~m

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