A charge +Q is placed on a thin conducting spherical shell of radius R use gauss's theorem to drive an expression for the electric field at a point lying (i) inside (11) and outside the shell

 

Three point Charges IPC each , are kept at the vertices of equilateral triangle of side 10cm. the find the net electric field at the centroid of the triangle

 

Two charged particles P and Q , having the same charge but different masses mp and mq start from rest and travel equal distances in a uniform electric field E in time tp and t q respectively Neglecting the effect of gravity the ratio of tp/ t q is

 

Figure shows variation of coulomb force (F) acting between two point charges with 1/ r being the separation b/w two point charges (q1 q2 ) and ( q2 q3 ) If q2 is positive and least in magnitude , then the magnitude of q1, q2 and q3 are such that

 

Six Point Charges Placed At Vertices Of Hexagon Of Side Im Net Electric Field At Centre Of Hexagon

 

Three Charges Are Placed As Shown In Figure The Net Force On Charge q Is

 

Four Charges Are Arranged At Corners Of Square ABCD The Force On The Charge Kept At Centre O Will Be