Consider a cylindrical region containing a magnetic field.
The field is directed into the plane of the screen and is changing at a constant rate K (K>0)
A metallic rod (AB) is placed as shown, at a distance d from the center. The length of the rod is L.
(O is not connected to the rod, just ignore the vertical line from O to the rod)
The rod is completely contained within the circle.
Find the potential difference between points B and A when the net electric field in the rod becomes zero.
d = 2 m
L = 2m
K = 1
If your answer is negative (say, negative 3) write it as -3
Scalar potential is defined for one type of electric field only.