Electrostatic P...

Figure shows the field lines of a positive point charge. The work done by the field in moving a small positive charge from Q to P is

Figure shows the field lines of a point negative charge. In going from B to A, the kinetic energy of a small negative charge will

Two tiny spheres carrying charges 1.8 μC and 2.8μC are located at 40 cm apart. The potential at the mid-point of the line joining the two charges is

In the question number 18, the potential at a point 20cm from the mid-point of the line joining the two charges in a plane normal to the line and passing through the mid-point is

Four equal charges q each are placed at four corners of a square of side a each. Work done in carrying a charge −q from its centre to infinity is