Electrostatics Concept Map
Electrostatics Concept Map
Electrostatics Concept Map
ELECTRIC CHARGES
VANDE GRAFF
GENERATOR DIELECTRIC SLAB
BETWEEN THE PLATES
Points to remember
Atoms having same charge repel each other and atoms having opposite
charges attract each other.
1. When charged object touches to a neutral object, they both have same
charge.
2. When two charged matter touch each other, total charge of the system
is conserved and they share the total charge according to their capacities.
If they have same amount of different charges, when we touch one
another they become neutral. If the amount of charges is different then,
after flow of charge they are both negatively or positively charged. Having
opposite charges after contact is impossible.
If the objects have same type of charge then the force is repulsive, if
they have opposite charges then force is attractive.
Repulsive or attractive electrical forces is equal in magnitude but
opposite in direction, it does not depend on the magnitudes of
charges.
Electric Field:A charged particle exerts a force on particles around it. The
influence of this force on surroundings as electric field. E= F/q=kq/r2.
F=E.q where; F is the force acting on the charge inside the electric field E.
Using this equation we can say that;
If q is positive then F=+E.q and directions of Force and Electric Field are
same
If q is negative then F=-E.q and directions of Force and Electric Field are
opposite.
Axial line
Equatorial line
Torque :
Potential energy: - p . E = - pEcos
Line integral of EF Intensity over a length of a curve depends on position not
of the path followed.
V=k.q/d
Axial Line
Surfaces having equal potentials are called equipotential surfaces.
E=q/40r2
E=/0
Capacitance and Capacitors: Capacitance is the ratio of charged gained per
potential gained of the conductors. Unit of capacitance is Coulomb per
Volt and it is called as Farad (F).
Dielectric constant
1.C=0A/d in air