EXAMPLE 2. ELECTRIC FORCES & ELECTRIC FIELDS DUE TO THREE CHARGE A(4 µC ), B(-6 µC) and C(2µC)

EXAMPLE 2
Three charges A(4 μC ), B(-6 μC) and C(2μC) are placed at the vertices of a right angle triangle ABC. AC=10 cm, BC=6 cm. (a) Find net force on charge B due to C and A charges (b) What is the electric field at the B ? Use the answer from part (b) to prove the answer for the magnitude of the force in part (a)