Electric field due to point charge

The electric field due to a point charge at a distance 6 m from it is 630 N/C. The magnitude of the charge is

The electric field due to a point charge at a distance R from it is E. If the same charge is placed on a metallic sphere of radius R , the electric field on the surface of the sphere will be nE , then the value of n is

Gauss Law, Application of Gauss law to find Electric field due to a point charge, an infinitely long rod and infinitely large plane

A short electric dipole is placed in the electric field due to a point charge. Then (A) The dipole must experience a force (B) The dipole may experience a force (C) The dipole must experience a torque (D) The dipole may experience a torque

Which of the following statement(s) is/are correct? If the electric field due to a point charge varies as r^(-2.5) instead of r^(-2),then the Gauss law will still be valid. The Gauss law can be used to calculate the field distribution around an electric dipole. If he electric field between two point charges is zero somewhere,then the sign of the two charges is the same. The work done by the external force is moving a unit positive charge from point A at potential "V_(A)" to point B at potential "V_(B)" is,(V_(B)-V_(A))

A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the 4 mu F and 9 mu F capacitors), at a point distance 30 m from it, would equal:

what is the nature of sysmmetery of the electric field due to (i) point charge and (ii) electric dipole ?

A point charge of 0.009 mu C is placed at origin. Calculate intensity of electric field due to this point charge at point (sqrt(2), sqrt(7), 0) .