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COMEDK · Physics · 17. Electrostatics

An electric dipole is placed at an angle of \(60^{\circ}\) with an electric field intensity \(10^4 \mathrm{~N} / \mathrm{C}\). If experiences a torque equal to \(4 \sqrt{3} \mathrm{~N}-\mathrm{m}\). The charge on the dipole, if the dipole length is 1 cm , is

  1. A 60 mC
  2. B 80 mC
  3. C 20 mC
  4. D 10 mC
Verified Solution

Answer & Solution

Correct Answer

(B) 80 mC

Step-by-step Solution

Detailed explanation

Given, \(E=10^4 \mathrm{~N} / \mathrm{C}, \tau=4 \sqrt{3} \mathrm{~N}-\mathrm{m}, \theta=60^{\circ}\) Dipole length, \(2 l=1 \mathrm{~cm}=10^{-2} \mathrm{~m}\) We know that, torque on dipole,…