Capacitance Questions

A parallel plate capacitor is made of two circular plates separated by a distance 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3 &#2...

If n1, n2 and n3 are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by...

Two thin dielectric slabs of dielectric constants K2 and K2 (K1 2) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field E between the plat...

When a capacitor of value 200 μF charged to 200V is discharged separately through resistance of 2 ohm and 8 ohm, then heat produced in joule will respectively be:

Three capacitors of value 6, 3 and 9 μF are joined according to the circuit and then the combination is connected with a battery of 10 volt. The potential difference across the third capacitor pl...

A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap of the capaci...

A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf 20V. If a dielectric material of dielectric constant K = 53 is inserted between the plates, the magnitude of the induce...

The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is :-

In the circuit shown in the figure, there are two parallel plate capacitors each of the capacitance C.The switch S1 is pressed first to fully charge the capacitor C1 and then released. The switch S2 i...

A parallel plate capacitor has a dielectric slab of dielectric constant K between its plates that covers 1/3 of the area of its plates, as shown in the figure. The total capacitance of the capacitor i...

A parallel plate capacitor having plates of area S and plate separation d, has capacitance C1 in air. When two dielectrics of different relative permittivity (ε1 = 2 and ε2 = 4) are introduc...

Two capacitors C1 and C2 are charged to 120V and 200V respectively. It is found that by connecting them together the potential on each one can be made zero. Then :...

A 2μF capacitor is charged as shown in the figure. The percentage of its stored energy dissipated after the switch S is turned to position 2 is...

A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distancebetween the plates is d and area of each plate is A, the energy stored in the capacitor is...

Consider a thin spherical shell of radius R with centre at the origin, carrying uniform positive surfacecharge density. The variation of the magnitude of the electric field |(r)| and the electric pote...

In the given circuit, a charge of +80 μC is given to the upper plate of the 4 μF capacitor. Then inthe steady state, the charge on the upper plate of the 3 μF capacitor is...

A parallel plate condenser has a uniform electric field E (V/m) in the space between the plates. IF the distance between the plates is d (m) and area of each plate is A (m2) the energy (joules) stored...

Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance d(d...

A fully charged capacitor C with initial charge q0 is connected to a coil of self inductance L at t = 0. The time at which the energy is stored equally between the electric and the magnetic field is :...

A resistor ′R′ and 2μF capacitor in series is connected through a switch to 200 V direct supply. Across the capacitor is a neon bulb that lights up at 120 V. Calculate the value of R ...