0Some important numericals on Colombs law are:-
Q1- Two charges each of -2μC AND +6μC are seperated by a distance 1mm. find colombian force between them.
Q2- Three charges each of q are placed at vertices of an equilateral triangle of side l. Find net force on its centroid due to other three charges?
Q3- Two charges each of Q are placed at some distance. A third charge q is placed at mid of them. If whole system is in equilibrium then find the relation between Q and q?
Q4- Two charges +9e and +e are seperated by a distance x. Where should a test charge be placed on line joining them such that it will be in equilibrium?
