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*ELECTROSTATIC POTENTIAL AND CAPACITANCE, due to a point charge, due to…
*ELECTROSTATIC POTENTIAL AND CAPACITANCE
ELECTROSTATIC POTENTIAL
Work done in bringing a unit +ve charge from infinity to any point in the electrostatic field
V=kΣQi/Ri
V=kQ/r
1 VOLT
One joule of work done to move 1 coulomb of charge from infinity to the point against ES force
The potential difference between points A & B :
Vb-Va=(Ub-Ua)/q
EOUIPOTENTIAL SURFACES
Surfaces with constant potential value at all point on the surface. (parallel component of electric field is 0)
ELECTRIC POTENTIAL ENERGY
The electric potential energy of any given charge or system of changes is termed as the total work done by an external agent in bringing the charge or the system of charges from infinity to the present configuration without undergoing any acceleration.
kQq/r
Electric potential energy of an Electric dipole in dipole from zero energy position to the desired position (The zero energy position to be one when the dipole When an electric dipole of dipole moment p is on it such that P= P× E This torque tends to rotate the dipole let dW the small amount of work done.
Capacitance
C=Q/V
Energy stored in a capacitor
U=(Q^2)/2C
Capacitance for isolated sphere
4πε0R
Capacitance when metal slab inserted
kε0A[kd-x(k-1)]
Capacitance for parallel plate capacitor
Kε0A/d
K=εr(dielectric constant
due to a point charge
due to dipole
potential energy of a dipole
Due to system of charges
