Answer
The electric field is zero.
Work Step by Step
At $r = 0$, there is no charge.
Therefore, the electric field is zero.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 23 - Gauss' Law - Problems - Page 683: 52a
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