Polarisation VectorHardQuestion 31578
Question
Polarisation vector P in a dielectric is defined as:
- AElectric field per unit volume
- BDipole moment per unit volumeCorrect
- CCharge per unit area
- DBound charge density
Correct answer
Dipole moment per unit volume
Explanation
P = Np (N dipoles per unit volume each with dipole moment p). Its divergence gives bound charge: ρ_b = −∇·P.