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ELECTROSTATIC THE STUDY OF PROPERTIES OF STATIONARY ELECTRIC CHARGES AND…
ELECTROSTATIC
THE STUDY OF PROPERTIES OF STATIONARY ELECTRIC CHARGES AND THEIR EFFECTS. ELECTRIC PHENOMENON ARISES FROM THE FORCES BETWEEN ELECTRIC CHARGES DESCRIBED BY
COULOMB'S LAW
CAPACITOR AND CAPACITANCE
Capacitor is used to store electrical energy. Capacitance is defined as ratio of the charge stored to the potential between the plates.
Parallel plate capacitor with dielectric slab of thickness t with dielectric constant K
Energy stored in a capacitor
Energy density
Combination of capacitors
parallel
series
ELECTROSTATIC POTENTIAL
WORK DONE PER UNIT POSITIVE TEST CHARGE BY AN EXTERNAL FORCE IN BRINGING A UNIT POSITIVE FROM INFINITY TO A POINT IN THE PRESENCE OF ANOTHER POINT CHARGE,
electric potential due to an electric dipole
Electric potential due to uniformly charged spherical shell.
inside the shell
on the shell
outside the shell
electric potential energy
Electric potential due to non- conducting charged solid sphere
COULOMB'S LAW
For two stationary point charges Q1 and Q2 are kept at a distance r ,
BASIC PROPERTIES OF CHARGES
TOTAL CHARGE OF AN ISOLATED SYSTEM IS CONSERVED
CHARGES ARE ADDICTIVE IN NATURE
CHARGES ARE QUANTIZED IN NATURE
ELECTRIC FIELD
The force experienced by a unit positive charge placed at that point
TORQUE
The net force experienced by the dipole is zero. Due to torque produced, dipole aligns itself in the direction of electric field.
ELECTRIC FLUX
Flux of electric field E through any area A is defined as,
Gauss's theorem
Total normal electric flux over a closed surface S in vacuum is 1/E times the charge q contained inside the surface.
ELECTRIC DIPOLE
Every dipole is associated with a dipole moment whose magnitude is equal to the product of magnitude of either charge q and distance 2a between the charges.
BASIC CHARACTHERISTICS
Electrostatic field lines do not form any closed loop
Two field lines can never cross each other
Field lines start from positive charges and end at negative charges.
