Calculate the electric field strength at distance of 3 m from a charge of 32n C placed in air.

Calculate the electric field intensity at apoint 1m away from a charge of 1C in air.

Find the electric field strength due to 5 mu C of charge at point 30 m away from it in air.

Two charges +0.2 mu mu C and -0.2 mu mu C are placed 10^(-6) cm apart. Calculate electric field at an axial point at a distance of 10 cm from their middle point.

calculate the electric field at point (5 m, 0) due to a point charge of 1 x 10(-6) C placed at (0,5m).

A spherical shell of radius 20 cm has 20 mu C charge placed in vacuum. Calculate the electric field intensity (i) at a distance of 15 cm and (ii) at a distance of 40 cm from the centre of the spherical shell.

The electric field strength at a distance r from a charge q is E. What will be electric field strength if the distance of the observation point is increased to 2r (A) E/2 (B) E/4 (C) E/6 (D) none of the above