00:06 Example 8.4 Potential at a point A in space is given as 4 × 105 V. (i) Find the work done in bringing a charge of 3 µC from infinity to the point A. (ii) Does the answer depend on the path along which the charge is brought ?
04:16 Example 8.5 If 120 J of work is done in carrying a charge of 6 C from a place where the potential is 10 volt to another place where the potential is V, find V
06:37 Example 8.6 A wire is bent in a circle of radius 10 cm. It is given a charge of 250μC which spreads on it uniformly. What is the electric potential at the centre ?
09:33 Example 8.7 A short electric dipole has dipole moment of 1 × 10-9 C m. Determine the electric potential due to the dipole at a point distance 0.3 m from the centre of the dipole situated a) on the axial line b) on the equatorial line c) on a line making an angle of 60° with the dipole axis.
16:55 Example 8.8 Two charges 5 × 10-8 C and -3 × 10-8 C are located 16 cm apart. At what point (s) on the line joining the two charges is the electric potential zero ? Take the potential at infinity to be zero.
26:43 Example 8.9 A small particle carrying a negative charge of 1.6 × 10-19 C is suspended in equilibrium between two horizontal metal plates 10 cm apart having a potential difference of 4000 V across them. Find the mass of the particle.
33:34 Example 8.10 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 space, where there is no other external field. Find the electrostatic potential energy of
the system.
37:45 Example 8.11 Calculate the electrostatic potential energy of the system of charges shown in the figure.
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