ElectricCharge:Charge is the property associated with matter dueto which it produces and
experiences electrical and magnetic effects.
Coulomb's Law : It says that force between two point charges at rest varies directly as the
product of magnitude of each charge and inversely as the square of distance between them.
Force depends on the nature of medium between the charges, is always along the line joining
the charges, is attractive if charge are unlike and repulsive if like.
The superposition principle :lf charge Qis acted upon by several charges q, q2 43.,Gn
then the force on Q can be found out by calculating separately the forces exerted by q, 92...
q, respectively on Q and then adding these forces vectorially.
force experienced by a unit positive
Electric field intensity(E) :Atapoint it is defined as the that
point charge (called test charge) assumed to be placed at point.
tangent to which ata point
Electricfield lines :Afield line is an imaginary curve, such that the
gives the direction of electric field at that point.
dipole moment ()If twO equal and opposite point charges q are separated by a
Electric having magnitude
distance 2a, then the electric dipole moment is defined as a vector quantity
p=qx2a and direction from negative to positivecharge.
experiences electrical and magnetic effects.
Coulomb's Law : It says that force between two point charges at rest varies directly as the
product of magnitude of each charge and inversely as the square of distance between them.
Force depends on the nature of medium between the charges, is always along the line joining
the charges, is attractive if charge are unlike and repulsive if like.
The superposition principle :lf charge Qis acted upon by several charges q, q2 43.,Gn
then the force on Q can be found out by calculating separately the forces exerted by q, 92...
q, respectively on Q and then adding these forces vectorially.
force experienced by a unit positive
Electric field intensity(E) :Atapoint it is defined as the that
point charge (called test charge) assumed to be placed at point.
tangent to which ata point
Electricfield lines :Afield line is an imaginary curve, such that the
gives the direction of electric field at that point.
dipole moment ()If twO equal and opposite point charges q are separated by a
Electric having magnitude
distance 2a, then the electric dipole moment is defined as a vector quantity
p=qx2a and direction from negative to positivecharge.
