Electrostatics Physics - Electrostatics

Capacity of a parallel capacitor with dielectric constant 5 is \(4 \mu F\). Calculate the capacity of the same capacitor when dielectric material is removed.

State the formula for electric field intensity at a point outside an infinitely long charged cylindrical conductor

State the formula giving relation between electric field intensity and potential gradient.

What do you mean by polar molecules and non-polar molecules? Give one example each.

What are polar dielectrics and non polar dielectrics

Define capacitance of a capacitor and its SI unit.

A parallel plate air condenser has a capacity of \(20 \mu F\). What will be the new capacity if: (a) the distance between the two plates is double? (b) a marble slab of dielectric constant 8 is introduced between the two plates?

Draw a neat labelled diagram of a parallel plate capacitor completely filled with dielectric.

Obtain an expression for equivalent capacity for combination of three capacitors connected in series.

Two charges of magnitude \(5 nC\) and \(-2 nC\) are placed at points \((2 cm , 0,0)\) and \((20 cm 0,0)\) in a region of a region of a space where there is a no external field. Find electrostatic potential energy of the system.

With the help of neat diagrams, explain how the non-polar dielectric material is polarised in external filed of increasing intensity. Define polarisation in dielectrics.

Six capacitors of capacities 5, 5, 5, 5, 10 and \(X \mu F\) are connected as shown in the network given diagram. Find: (a) The value of X if the network is balanced, and (b) The resultant capacitance between A and C.

The energy density at a point in a medium of dielectric constant 6 is \(26.55 \times 10^6 J / m ^3\). Calculate electric field intensity at that point. \(\left(\varepsilon_0=8.85 \times 10^{-12}\right.\) SI units) \(\left[\right.\)

With the help of a neat diagram, describe the construction and working of van de Graff generator.