Question

8 identical spherical drops having potential 5 volt each coalesce to form a bigger spherical drop calculate potential of bigger drop.​

Answer 1

V=rkq=20V

34πR3=8×34πr3⇒R=2r

Q′=8q

V′=RkQ′=2rk×8q=r4kq=4×20

V′=80V