List of top Physics Questions on Capacitors and Capacitance

A parallel plate capacitor of capacitance \[ 12\,\mu\text{F} \] is charged to a potential of \[ 180\,\text{V}. \] If the distance between the plates of the capacitor is \[ \frac{3}{\sqrt{\pi}}\ \text{mm}, \] then the energy density of the electric field between the plates is

Three capacitors of capacitances $3\ \mu\text{F}$, $3\ \mu\text{F}$ and $3\ \mu\text{F}$ are connected in series. The equivalent capacitance is}

A parallel plate capacitor consists of two circular plates of radii 5 cm and 10 cm. The centres of the two plates are kept on the same straight line with a separation of 'd' and the plates are completely immersed in a liquid of dielectric constant 18. If the capacitance of the capacitor immersed in the liquid is 250 pF, then the value of 'd' is

In a parallel plate air capacitor of plate separation '\(d\)', a dielectric slab of thickness '\(t\)' is introduced between the plates. The capacitance becomes one-third of the original value. The dielectric constant of the slab will be

A parallel plate air capacitor has capacity 'C' farad, potential 'V' volt and energy 'E' joule. When the gap between the plates is completely filled with dielectric

A capacitor of capacitance C has charge Q and energy stored in it is W. If the charge is increased to 3Q, the energy stored in the capacitor W' will be

A capacitor has capacity C when it's parallel plates are separated by air medium of thickness 'd'. A slab of material of dielectric constant K having area equal to that of plates but thickness \(\frac{d}{2}\) is inserted between the plates. Capacitance of the capacitor in the presence of slab will be

The electric field between the plates of a parallel plate capacitor is 'E'. If the charge on the plates is Q then the force on each plate is

The function of a dielectric in a capacitor is to

The capacitance of a capacitor becomes \(\frac{7}{6}\) times the original value if dielectric slab of thickness \(t = \frac{2d}{3}\) is introduced between the plates, where 'd' is the distance of separation between the plates. The dielectric constant of the slab is

A parallel plate capacitor has plate area \(40\text{ cm}^2\) and plates separation \(2\) mm. The space between the plates is filled with a dielectric medium of a thickness \(1\) mm and dielectric constant \(5\). The capacitance of the system is

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now pulled further apart using insulating handles:

A capacitor of \(10\,\mu F\) is charged to \(50\,V\). Calculate the energy stored in the capacitor.

ત્રણ સમાન કેપેસિટર P, Q અને S, દરેકની કેપેસિટન્સ C,ને વોલ્ટેજ Vવાળી બેટરી સાથે જોડવામાં આવ્યા છે. જો કેપેસિટર Pમાં સંગ્રહિત સંભવિત ઊર્જા \( U_P \) અને સિસ્ટમમાં કુલ સંગ્રહિત ઊર્જા \( U_T \) હોય, તો ગુણોત્તર \( \frac{U_P}{U_T} \) છે:

Find effective capacitance between A and B is:

The capacitance of a parallel plate capacitor is 50μF. If the linear dimension of the plates are doubled and the separation between the plates is increased to 4 times, what would be the new value of the capacitor?

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

A parallel plate capacitor of capacitance C has a dielectric slab between its plates. It is charged to a potential difference V by connecting it across a battery. The battery is then disconnected. If the dielectric slab is now withdrawn from the capacitor, how will the following be affected ?Justify your answer in each case.

Two metal spheres of radii $r_1$ and $r_2$ having charges $q_1$ and $q_2$ are brought in contact. Which statement is NOT correct?

Two metal spheres of radii $r_1$ and $r_2$ having charges $q_1$ and $q_2$ are brought in contact. Which statement is NOT correct?

Two air core capacitors of equal capacitance $C$ are connected in series. If one of them is filled with a dielectric substance of dielectric constant $k$, the effective capacitance becomes

A battery is kept connected to the plates of a parallel-plate capacitor. A dielectric slab of dielectric constant \(K\) is then introduced between the plates such that it covers the entire space between the plates. Choose the correct answer from the given alternatives.

Three capacitors of capacitances \(2\,\mu F\), \(3\,\mu F\), and \(6\,\mu F\) are connected in series. The equivalent capacitance is:

A parallel plate capacitor has capacitance $C$. If a dielectric slab of dielectric constant $K$ and thickness equal to half the plate separation is introduced parallel to the plates, the new capacitance is: