Capacitor

Capacity of a parallel plate capacitor in the absence of dielectric medium is $C_0$. A sheet of dielectric constant $k$ and thickness of one-fourth of the plate separation is inserted between the plates. If the new capacity is $C$, then $\f...

A network of four capacitors of capacity equal to $C_1=C, C_2=2 C, C_3=3 C$ and $C_4=4 C$ are connected to a battery, as shown in the figure. The ratio of the charges on $C_2$ and $C_4$ is $\_\_\_\_$

\(\text { A } 2 \mu \mathrm{~F} \text { capacitor is charged as shown, }\)

When switch $S$ is shifted to position $2, \%$ of energy lost is

A parallel plate capacitor with air between the plates has a capacitance of \(15 \mathrm{~pF}\). the separation between the plates is \(d\). The space between the plates is now filled with two dielectrics constant \(k_1=3\) and thickness $$...

A capacitor is filled with two dielectrics of the same dimensions but of dielectric constants 2 and 3 as shown in Fig.(a) and then in Fig.(b). Then ratio of the capacitor in the two arrangements is

A parallel plate capacitor with plate area \(A\) and separation between the plates \(d\) is charged by a constant current \(i\). Consider a plane surface of area \(A / 2\) parallel to the plates and drawn simultaneously between the plates. ...

Two identical capacitors are first connected in series and then in parallel. The ratio of equivalent capacitance is

A parallel plate capacitor of capacitance \(5 \mu \mathrm{F}\) is charged to \(120 \mathrm{~V}\) and then connected to another uncharged capacitor. If the potential falls to \(40 \mathrm{~V}\), and capacitance of the second capacitor is