Question

Find the position of third charge in equilibrium. If the two charges + e and -4 e are placed at a distance d also find the magnitude of charge Q3

Answer 1

Answer:

coulamb formula is used for this and third charge is placed near +e charge but not between +e and-4e because when opposite charge present then neutral point is outside and always near lower charge foreqlibrium fnet is zero and suppose 3rd charge value is q then k×q×e/x^2 = k×4e×q/ (d+x)^2 where x is distance between +e charge and solving you got x= d then find the magnitude of this charge you found fnet value zero any charge point I choose+e then equation is k×q×e /d^2 = k×e×4e/d^2 after solving q= 4e charge but in negative