In NaCl the centres of two nearst like-charged ions are present at a distance of:

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 :

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 :

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 :

Two rigid pointed look-like structures are present in

The repulsive force between two like charges of 1 coulomb each separated by a distance of 1 m in vacuum is equal to

NaCl is fcc lattice , where Na^+ ions are at corner and face centre position . Chloride ions are at edge centres and body centre positions. How many NaCl formula units will be in an unit cell ?