derivation for energy stored in a capacitor?

a non conducting ring of radius 0.5 m carries a total charge of 1.11*10^{-10} C distributed non uniformly on it's circumference producing electric field E vector everywhere in the space . the value of the line integral ∫ -E. dl ( llower limit =infinity , upper limit = 0) (=0 being at the centre of the ring ) in volts is

show that there is always a loss of energy when two capacitors charged to different potentials share charge

why is electrostatic potential constant throughout the volume of the conductor and has the same value(as inside) on its surface??

Draw an equipotential surface in a uniform electric field...

Electric potential in an electric field is given by v=K/r ( K=const). If the posiion vector r = 2i + 3j + 6k, the electric field is given by

A) ( 2i + 3j + 6k) / 243

B) (2i + 3j + 6k) / 343

C) (3i + 2j + 6k) / 243

D) (6i + 2j + 6k) 343

Plz do all the proper.

A 10 micro faran capacitor is charged by a 30V dc supply & then connected across an uncharged capacitor of 50 micro faran. Calculate the(1) final potential difference across the combination & the (2)initial & final energies. How will you account for the difference in energies?

derivation of electric potential at a point on axial line of an electric dipole

Two electrons are moving towards each other,each with a velocity of 10^{6}m/s.What will be losest distance of approach between them?

draw schematically an equipotential surface of a uniform electrostatic field along x-axis.

answer soon pls

derivation for energy stored in a capacitor?

a non conducting ring of radius 0.5 m carries a total charge of 1.11*10

^{-10}C distributed non uniformly on it's circumference producing electric field E vector everywhere in the space . the value of the line integral ∫ -E. dl ( llower limit =infinity , upper limit = 0) (=0 being at the centre of the ring ) in volts isshow that there is always a loss of energy when two capacitors charged to different potentials share charge

the circuit is in series with a at one end and the capacitors connecetd in series

why is electrostatic potential constant throughout the volume of the conductor and has the same value(as inside) on its surface??

Draw an equipotential surface in a uniform electric field...

Electric potential in an electric field is given by v=K/r ( K=const). If the posiion vector r = 2i + 3j + 6k, the electric field is given by

A) ( 2i + 3j + 6k) / 243

B) (2i + 3j + 6k) / 343

C) (3i + 2j + 6k) / 243

D) (6i + 2j + 6k) 343

Plz do all the proper.

A 10 micro faran capacitor is charged by a 30V dc supply & then connected across an uncharged capacitor of 50 micro faran. Calculate the(1) final potential difference across the combination & the (2)initial & final energies. How will you account for the difference in energies?

derivation of electric potential at a point on axial line of an electric dipole

i) positive ii) negative?

Two electrons are moving towards each other,each with a velocity of 10

^{6}m/s.What will be losest distance of approach between them?2 identical parallel plate capacitors connected to a battery with the switch 's' closed . the switch 's' is now open and the free space between the plate of the capacitor is filled with a dielectric of k=3. Find the ratio of total energy stored in both capacitors before and after the introduction of the dielectric

draw schematically an equipotential surface of a uniform electrostatic field along x-axis.

answer soon pls