Question

Two fixed point charges +4e and +e units are separated by a distance ‘r’. Where should be the third charge be placed for it to be at equilibrium?

Answer 1

both the positive the charges are positively charged

if a positive charge is placed at the center then both the charges will attract it towards itself

but if a negative charge is placed at the center then both the charges will repel each other

in both the cases the charge placedin the middle will be at equilibrium

i hope this helps ( ╹▽╹ )