A 0.200-g ball in air hangs from a thread in a uniform vertical electric field of 3.00
Question:
A 0.200-g ball in air hangs from a thread in a uniform vertical electric field of 3.00 kN/C directed upward. What is the charge on the ball if the tension in the thread is
(a) Zero and
(b) 4.00 mN?
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