Question

Calculate the torque on each dipole of dipole moment p each placed perpendicular to each other at a distance of r

Answer 1

The value of torque on each dipole is

F+ =  + qE sinθ

F-  =  - qE sinθ

Explanation:

• Since both dipoles are equal in magnitudes and are separated by distance "d".
• Formula of Torque is given as:
• Torque = Force x distance
• τ = (q.E) d sinθ
• We know that dipole moment:
• p = q  x d
• Direction of dipole moment is from + ve to -ve charge.
• Now the torque on each dipole is
• On positive dipole:
• F+ =  + qE
• On negative dipole:
• F- = - q E