Two positive charges q1=20C and q2=6C are separated by diameter of 3m. Then what is the force produced by them?
Here, r=32=1.5m and charges are q1=20 and q2=6
Coulomb's law,
F=kq1q2r2
Therefore, (for simplicity assume k=1)
F=20×6(1.5)2=53.3N
Two uniformly charged spheres with radii r1 & r2 and charges Q1 & Q2 are separated by distance d (from the periphery of the two spheres). What is the magnitude of force on Q2 due to Q1?