Two spheres A and B are charged with the charges of +10 and +20 coulomb respectively and separated by a distance of 80 cm. The electric field at point on the line joining the centres of the two spheres will be zero at a distance from the sphere A :
The force of repulsion between two point charges is F, when these are at a distance of 1 m . Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m , then compare the force of repulsion in two cases.
An electron released on the axis of a positively charged ring at a large distance from the centre will
Choose the letter of the best answer Two like charges
A charge 'q' is placed at the centre of a conducting spherical shell of radius R, which is given a charge Q. An external charge Q' is also present at distance R' (R' gt R) from 'q'. Then the resultant field will be best represented for region r lt R by : [where r is the distance of the point from q]
Three centred two electron bond is present in
Two rigid pointed look-like structures are present in
