The plates of a parallel plate capacitor have on area of `90 cm^(2)` each and are separated by `2.5 mm`. The capacitor is charged to 400 V. How much electrostatic energy is stored in it ? How much when it is filled with a dielectric medium `K = 3` and then charged ? If it is first charged as an air capacitor and then filled with th dielectric, then ?

The plates of a parallel plate capacitor have an area of 90 cm^(2) each and are separated by 2.5mm. The capacitance is charged by connecting it to a 400V supply. (a) How much electrostatic energy is stored by the capacitor ? (b) View this energy as stored in the electrostatic field between the plates, and obtain the energy per unit volume (u). Hence arrive at a relation between U and the magnitude of electric field E between the plates.

The plates of a parallel plate capacitor have an area of 90cm^(2) and each are separated by 2mm. The capacitor is charged by connecting it to a 400 V supply. Then the energy density of the energy stored (in Jm^(-3) ) in the capacitor is (take epsi_(0)=8.8xx10^(-12)Fm^(-1) )

A 12 pF capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the capacitor ? If another capacitor of 6 pF is connected across the combination, find the charge stored and potential difference across each capacitor.

A 900 pF capacitor is charged by 100V battery. (a) How much electrostatic energy is strored by the capacitor ? The capacitor is disconnected from the battery and connected to another 900 pF capacitor. How much is the electrostatic energy stored in the system ?

A parallel-plate capacitor having plate are 100 cm ^2 and separation 1.0 mm holds a charge of 0.12 muC when connected to a 120 V battery. Find the dielectric constant of the material filling the gap.

A parallel plate capacitor having a plate separation of 2mm is charged by connecting it to a 300v supply. The energy density is

A parallel plate capacitor is constructed with plates of area 0.0280 m^(2) and separation 0.550 mm . Find the magnitude of the charge on each plate of this capacitor when the potential between the plates is 20.1 V

The separation between the plates of a parallel-plate capacitor is 2 mm and the area of its plates is 5cm^(2) . If the capacitor is charged such that it has 0.01J energy stored in it, the electrostatic force of attraction between its plates is _______N.

A parallel plate capacitor is made of two circular plates separated by a distance 5mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3xx10^4V//m the charge density of the positive plate will be close to:

A parallel plate capacitor of area 100 cm^(2) and plate separation 8.85 mm is charged to a potential difference of 100 V when air is used between the plates. The capacitor is now isolated and air is replaced by glass (epsi_(r) - 5) , then: