A pith ball is suspended from a string, and when a rubber rod is brought close to the ball at \(t=0\), the ball is not noticeably affected by the rod. At \(t=5.00 \mathrm{~s}\) the rod is turned around such that the opposite end is nearest the ball. Now the ball is attracted to the rod. At \(t=10.0 \mathrm{~s}\) the rod and ball are brought into contact. Draw a charge-versus-time graph showing a plausible charge magnitude on the rod in the time interval from \(t=0\) to t=15 s .