List of top Physics Questions on coulombs law asked in JKCET

Two small charged spheres have charges of $ 2 \times 10^{-7}\, C $ and $ 3 \times 10^{-7}C $ . They are placed $ 30\,cm $ apart in air. What is the force between them ?

The net electric force on a charge of $ +3\,\mu C $ at the mid-point on the line joining two charges of magnitude $ +2\,\mu C $ and $ -2\,\mu C $ separated by the distance of $6\,mm, $ is