Please explain follow questions. 2. A pith ball is suspended from a string, and
ID: 2000693 • Letter: P
Question
Please explain follow questions.
2. 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 = 5.00s the rod is turned around such that the opposite end is nearest the ball. Now the ball is attracted to the rod. At t =10.0s 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=15s.
3. A charged sphere with 1*10^8 units of negative charge is brought near a neutral metal rod. The half of the rod closer to the sphere has a surplus charge of 1*10^4 units. What is the magnitude of the charge on the half of the rod farther from the sphere? Is this charge positive or negative?
Explanation / Answer
3.
since the metal rod was neutral , the charge on the other half must be equal and opposite so that the net charge on the rod be 0.
magnitude of charge = 1 x 104
sign = negative