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PhysicsJEE Main 22 Jan 2026, Shift 1·Q18·MCQ·Easy–moderate

Newton's Laws of Motion · Newton's laws

A simple pendulum has a bob with mass mm and charge qq. The pendulum string has negligible mass. When a uniform and horizontal electric field E⃗\vec E is applied, the tension in the string changes. The final tension in the string, when pendulum attains an equilibrium position is . (gg: acceleration due to gravity)
  1. (1)mg−qEmg - qE
  2. (2)mg+qEmg + qE
  3. (3)m2g2+q2E2\sqrt{m^2g^2 + q^2E^2}
  4. (4)m2g2−q2E2\sqrt{m^2g^2 - q^2E^2}

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