15 charged particles with the same charge (q) are placed on the x-axis. They are symmetrically distributed on both sides of the y-axis. The distance between any two consecutive particles is R/3 and one of the charges is at the origin.
What is the electric flux through a sphere centred at the origin having a radius of 1.5R?
A. 15q/∈0
B. 8q/∈0
C. 9q/∈0
D. 5q/∈0
Two small metal blocks (X and Y) of the same mass m are placed on an insulated frictionless surface such that both of them are at the same distance from the edge of the surface as shown in the image below. The charge on block X is +100Q and that on Y is +50Q. The two blocks are held in position by an external force.
