Types of Capacitors

The earth is assumed to be a charged conducting sphere having volume $V$ and surface area $A$. The capacitance of the earth in free space is (${\epsilon }_0=$ permittivity of free space)

Eight drops of mercury of equal radii possessing equal charges combine to form a big drop. Then, the capacitance of bigger drop compared to each individual small drop is

Variable capacitance is accomplished by altering the distance between the in a capacitor

Which is variable type of capacitors?

What do yo replace paper capacitors with?

What do you mean by paper capacitors ?

Mica capacitor is highly_____.

Describe the construction of mica capacitors?

What is ceramic capacitor used for?

What are the types of ceramic capacitor?

A mica a capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

A capacitor has a voltage difference of 10 V across the plates. It has stored charges of 1000 micro-coulombs. What is the capacitance value?

_____ capacitor are used in transistors circuits.

Which of the following capacitor type uses chemical reactions for storing the charge?

In which devices are variable capacitors used?

Capacitance of a parallel plate air capacitor depends on

Capacitors that are used in high-frequency circuits such as RF audio are _____

A cylindrical capacitor is constructed using two coaxial cylinders of the same length $10 \mathrm{cm}$ Of radii $5 \mathrm{mm}$ and $10 \mathrm{mm}$. Calculate the capacitance :

A parallel plate air capacitor has plate area $0.2 {\mathrm{m}}^2$ and has separation distance $5.5 \mathrm{mm}$. Find its capacitance when capacitor in $\left(\mathrm{nF}\right)$  is charged to a potential difference of $500 \mathrm{volts}$. (Use: ${\epsilon }_0=8.85\times {10}^{-12} {\mathrm{C}}^2 /\mathrm{N} {\mathrm{m}}^2$)

Briefly explain Parallel Plate capacitor.