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MHT CET202211 Aug 2022Morning ShiftPhysicsElectrostaticsActual

Three charges q, Q and +4 q are placed in a straight line of length d at points at distances 0, d 2 and d respectively. In order to make the net force on q to be zero, the value of Q should be

Options

  1. A-2 q
  2. B-q 2
  3. C-q
  4. D-3 2 q

Correct answer

C. -q

Step-by-step solution

Consider the diagram below: To make net force on q is zero, charge Q should be negative. aligned & k q Q ( d 2 )^2 + k q(4 q) d^2 =0 & Q=-q aligned

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