01 Why can a dipole have torque in a uniform electric field even when net force is zero?
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Answer and explanation
Correct answer: A. Because equal opposite forces act at different points
Explanation: In a uniform field, the positive and negative charges of a dipole experience forces of equal magnitude in opposite directions, so their vector sum is zero. However, the forces act at separate locations, forming a couple. The couple produces torque τ = pE sin θ, which can rotate the dipole even though the net force is zero. Thus option A is correct; B confuses two different physical quantities, while C and D are false.