Figure shown pallel plate capacitors with fixed plate and connected to two batteries .The separation between the plate is the same for the two capacitors .The plates are rectangular in shape with width b and lengths `l_1 and l_2.` The left half of the dielectric slab has adielectric constant`K_1` and the right half `K_2`. neglecting any friction ,find the ratio of the emf of the right battery for which the dielctric slab may remain in equilibrium.

Find the force of attraction between the plates of a parallel plate capacitor.

A parallel -plate capacitor with the plate area 100cm^2 and the separation between the plate 1.0cm is connected across a battery of emf 24 volts .Find the force of attraction between the plates.

A parallel-plate capacitor is connected to a battery. A metal sheet of negligible thickness is placed between the plates. The sheet remains parallel to the plates of the capacitor.

The plates of a paraller-plate capacitor are made of circular discs of radii 5.0 cm each .If the separation between the plates is 1.0 mm,What is the capacitance?

Two parallel plate capacitors, each of capacitance 40 muF , are connected is series. The space between the plates of one capacitor is filled with a dielectric material of dielectric constant K =4. Find the equivalent capacitacne of the system.

A parallel-plate of capacitor of capacitance 5mu F is connected in a battery of emf 6V. The separation between the plate is 2mm.(a) Find the charge on the positive plate.(b) find the eletric field between the plate.(c) A dielectric slab of thickness 1 mm and dielectric constant 5 is inserted into the gap to occupy the lower half of it.Find the capacitance of the new combination .(d)How much charge has flow n through the battery after the slab is inserted?

A dielectric slab is inserted between the plates of an isolated capacitor. The force between the plates will

What is the electric field in between the plates of a capacitor in the presence of adielectric medium?