AP EAMCET202021 Sep 2020Morning ShiftPhysicsElectrostaticsActual
An electric dipole with dipole moment (p ) is placed with its axis at (30^ ) to a uniform electric field. The work done in rotating the dipole to a position where its axis is perpendicular to the field is
Options
- A(2 p E )
- B( 2 p E 3 )
- C( 3 p E 2 )
- D0
Correct answer
C. ( 3 p E 2 )
Step-by-step solution
Given, for an electric dipole, ( aligned & ₁=30^ & ₂=90^ aligned ) ( ) Work done in rotating the dipole from ( ₁=30^ ) to a position, where its axis is perpendicular ( ( ₂=90^ ) ) to electric field is given as ( aligned W & =p E ( ₁- ₂ ) & =p E ( 30^ - 90^ ) & =p E ( 3 2 -0 )= 3 2 p E aligned )