Write general equation of Coulombian force on `q_1` by system of charges `q_(1),q_(2)` and `q_(3)`

Write expression of Coulombian force acting between two charges kept in medium.

According to Coulomb's law force between two charges q_(1) and q_(2) at 'r' distance apart....

The Bohr model for the H-atom relies on the Coulomb's law of electrostatics. Coulomb's law has not directly been verified for very short distances of the order of angstroms. Supposing Coulomb's law between two opposite charge +q_(1),-q_(2) is modified to |F|=(q_(2)q_(1))/((4pi epsi_(0)))(1)/(r^(2)),r ge R_(0) =(q_(1)q_(2))/(4pi epsi_(0))(1)/(R_(0)^(2))((R_(0))/(r))^(e),r lt R_(0) Calculate in such a case, the ground state energy of a H-atom if epsi=0.1 R_(0)=1Å

Three identical charges are placed on three vertices of a square. If the force acting between q_(1) and q_2 is F_(12) and between q_(1) and q_(3) is F_(13) , then = ..........

In figure, two positive charges q_2 and q_3 fixed along the y-axis, exert a net electric force in the + x direction on a charge q_(1) fixed along the x-axis. If a positive charge Q is added at (x, 0), the force on q_(1)

The position vectors of points of intersection of three planes rcdotn_1=q_1, rcdotn_2=q_2, rcdotn_3=q_3, where n_1, n_2 and n_3 are non coplanar vectors, is

Three concentric conducting spherical shells have radii r, 2r, and 3r and charges q_1,q_2 and q_3 , respectively. Innermost and outermost shells are earthed as shown in figure. The charges shown are after earthing. Select the correct alternative.

The electric force between two electric charges is given by F= (1)/(4pi epsi_(0))(q_(1)q_(2))/(r^(2)) . where is a distance . between charges q_(1) and q_(2) . So, unit and dimensional formula of epsi_(0) , is ...... and...... respectively.