List of top Physics Questions on Capacitance

In the arrangement shown, the charge on capacitor \(C_1\) is: center

center

A parallel plate capacitor \((C)\) is connected to a battery as shown in the figure. Consider two cases: Case-I: Key \(k\) is kept closed and plates of the capacitor are moved apart using an insulating handle. Case-II: Initially key \(k\) is closed for a long time and then opened. Now, the plates of the capacitor are moved apart using an insulating handle.

Identify the correct statements among the following: (A) In Case-I, \(Q\) remains same but \(C\) changes. (B) In Case-II, \(V\) remains same but \(C\) changes. (C) In Case-I, \(V\) remains same and hence \(Q\) changes. (D) In Case-II, \(Q\) remains same and hence \(V\) changes. Choose the correct answer from the options given below:

A capacitor of 10 \(\mu\text{F}\) charged up to 200 V is connected in parallel with another capacitor of 20 \(\mu\text{F}\) charged up to 50 V. The common potential is:

As shown in the figure two capacitors \( C_{1} \) \& \( C_{2} \) each having same gap between the plates x filled with different media of dielectric constants 3K and 6K respectively. If these two capacitors are connected to a battery, the ratio of potential differences across dielectric layers of \( C_{1} \) and \( C_{2} \) is:

When dielectric is inserted between the plates of a capacitor with battery connected, energy increases because of:

Three capacitors have capacitances \(2\,\mu F\), \(4\,\mu F\) and \(8\,\mu F\). When they are connected in a way to give minimum capacitance, their effective capacitance is:

A parallel plate capacitor with dielectric is charged completely and the battery is then disconnected. Now if the dielectric is slowly pulled out of the capacitor then the variation of the potential (V) of the capacitor with respect to the length (x) of the dielectric pulled out is represented by

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 capacitor has capacitance $C$. When dielectric of constant $3$ completely fills it, new capacitance is:

A network of five capacitors is shown in the figure. The total charge stored in the network connected between \(A\) and \(B\) is:

In the figure given below, the resultant capacitance between points \(A\) and \(B\) is:

Four capacitors are connected in a circuit as shown in the figure. The effective capacitance between \(P\) and \(Q\) is:

Four capacitors are connected as shown in the figure. If \(C_1=2\,\mu F\), \(C_2=3\,\mu F\), \(C_3=5\,\mu F\) and \(C_4=10\,\mu F\), then the equivalent capacitance between points \(A\) and \(B\) is:

A parallel plate capacitor having area \(A\) and separated by distance \(d\) is filled by a copper plate of thickness \(b\). The new capacity is:

A parallel-plate air capacitor has an initial capacitance value of \( 8\,\mu\text{F} \). If the space between the plates is completely filled with a solid dielectric slab having a dielectric constant \( K = 5 \), what will the new capacitance value of the component be?

The dimensional formula of capacitance is:

The function of a dielectric in a capacitor is

The graph shows the variation of voltage (v) across the plates of two parallel plate capacitors $A$ and $B$ versus increase of charge $Q$ stored in them. Then

A parallel plate capacitor is charged by an ac source. Show that the sum of conduction current (\( I_c \)) and the displacement current (\( I_d \)) has the same value at all points of the circuit.

In between the plates of parallel plate capacitor of plate separation '$d$' a dielectric plate of thickness '$t$' is inserted. The capacitance becomes one-third of the original capacity without dielectric. The dielectric constant of the plate is

A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. If the area of each stair is \(\frac{A}{3}\) and the height is d, the capacitance of the arrangement is: