Question

Three point charges of + 2 microcoulomb, - 3 microcoulomb and -3 microcoulomb are kept at the at the vertices A, B & C respectively of an equilateral triangle of side 20 cm as shown in the figure. what should be the sign and magnitude of charges to be placed at the midpoint M of side BC so that charge at A remains in equilibrium.

Answer 1

-3-3 answer is -6 and -6 +2 answer is -4 and 4 divided by 20 =5