Question

Explain Please Also

Two small beads having positive changes q_1 = 4q and q_2 = q are fixed at the opposite ends of a horizontal insulating rod of length d = 1.50 m. The bead with charge q_1 is at the origin. As shown in the figure below, a third small, charged bead is free to side on the rod. (a) At whet position x is the third bead in equilibrium? x = m (b) Can be equilibrium be stable? Yes, if the third bead has a positive change Yes, it the third bead has a negative charge No

Answer 1

,02) d-2 2 千m

(b) explanation: if it were negetive charge, and when displaced slightly towards any of the two charges the attractive force between the third bid and next positive charge will dominate the the attractive froce between the bid and other positive charge and bid will start moving towards the former positive charge and hence it is a unstable equlibrium position in case of negetive bid.