A wire is bent in a circle of radius 10cm. It is given a charge of `250µC` which spreads on it uniformly. What is the electric potential at the centre?

Three point electric charges q_1 = 6µC, q_2 = 4µC and q_3 = -8µC are placed on the circumference of a circle of radius 1m as shown in the figure. What is the value of the charge q, placed on the circle if the potential at the centre of the circle is zero?

A spherical conductor of radius 12cm has a charge of 1.6x10^(-7) C distributed uniformly on its surface. What is the electric field a) Inside the sphere. b) Just outside the sphere. c) At point 18cm from the centre of the sphere?

A wire 66 cm long is bent into a circle. What is the area enclosed within it?

A hollowing metallic sphere of radius 10cm is charged such that potential on its surface is 80V. the potential at the center of the sphere would be.

A point charge of + 10 mu c is at a distance of 5 cm directly above the centre of a square of side 10 cm as shown in figure. What is the electric flux through the square?