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MHT CET20243 May 2024Evening ShiftPhysicsElectrostaticsActual

A charge +Q is placed at each of the diagonally opposite corners of a square. A charge -q is placed at each of the other diagonally opposite corners as shown. If the net electrical force on +Q is zero, then +Q -q is equal to

Options

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

Correct answer

B. +2 2

Step-by-step solution

From the diagram, aligned & ( F _ A )^2= ( F _ R )^2 2 ( ~F _ A )^2= F _ R ^2 & 2 (F_A ^ )=F_R & 1 4 ₀ 2 Q (- q ) a ^2 = 1 4 ₀ Q ^2 2 a ^2 & Q=-2 2 q & Q q = -2 2 1 & Q -q =2 2 aligned

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