Three infinitely long charge sheets are placed as shown in the figure
Find the electric field at the point P.

A uniform but time-varying magnetic field B(t) exists with in a circular region of radius a and is directed in to the plane of the paper as shown in the figure. The magnitude of the induced electric field at the point P at a distance r from the centre of the circular region

Two insulating infinitely long wires are lying mutually perpendicular to each other as shown in the figure. If the two wires carry currenst I_1 and I_2 as shown in the figure, find the magnetic field at point P (A,b).

Five charges, q each, are placed at the corners of a regular pentagon of side a as shown in the figure. What will be the electric field at O, the centre of the pentagon? What will be the electric field at O, fi the charge from one of the corners (Say A) is removed? What will be the electric field at O, if the charge q at A is repalced by - q?

Four point charges are placed at the four corners of a square in the two ways as shown in the fig. Will the electric field at the centre of the square, be the same or different in the two configurations and why?

Three charges, each equal to q, are placed at the three corners of a square of side a. Find the electric field at the fourth corner of the square.

In the electric field show in the figure the electric field lines on the left have twice the separation as that between those on the right. If the magnitudes of the fields at point A is 40NC^(-1), calculate the force experienced by a proton placed at point A . Also find the magnitude of electric field at the point B.

The point charges Q and -2Q are placed at some distance apart. If the electirc field at the location of Q is E, the electric field at the location of -2Q will be

Four point charges Q, q, Q and q are placed at the corners of a square of side 'a' as shown in the figure. Find the resultant electric force on a charge Q?

Two large flat parallel sheets A and B having a uniform charge density + sigma are held as shown in the figure. Graphically, represent the variation of electric field due to the two sheets as one moves from the point O to P.