Define the term dipole moment of an electric dipole indicating its direction. Write its S.I unit. An electric dipole is placed in a uniform electric field . Deduce the expression for the Torque acting on it.
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Electric dipole moment :
When two equal and opposite charge is separated by a small distance.
Mathematically :
P = q × 2 l
It is vector quantity.
It's direction always negative to positive.
SI unit of electric dipole is Coulomb-meter ( C m ).
Torque on an electric dipole placed in a uniform electric field :
= > Torque = Force × ⊥ distance between force and axis of rotation .
i.e. τ_net = P E sin Φ
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