JEE Main202528 Jan 2025Evening ShiftPhysicsElectrostaticsActual
An electric dipole of dipole moment 6 10⁻⁶ Cm is placed in uniform electric field of magnitude 10^6 ~V / m . Initially, the dipole moment is parallel to electric field. The work that needs to be done on the dipole to make its dipole moment opposite to the field, will be ____ J.
Correct answer
0
Step-by-step solution
Work done in rotating a dipole = U or aligned W & = (-P E _f )- (-P E _i ) & =2 P E ( _f=180^ and _i=0^ ) & = (2 6 10⁻⁶ 10^6 ) J =12 ~J aligned