The magnitude of the electric field in a region is given by E =kQ/r2 where Q is the charge. What is the potential difference between r = a tor= b?
a) kg((1/b²)-(1/a²))
b) kg((1/b)-(1/a))
c) - kg((1/b)-(1/a))
d) - kg((1/b²)-(1/a²))
e) None of the above.