(8c24p23) A circular plastic rod of radius R = 0.80 m has a positive charge = Q
ID: 2137404 • Letter: #
Question
(8c24p23) A circular plastic rod of radius R = 0.80 m has a positive charge = Q = 7.00
A circular plastic rod of radius R = 0.80 m has a positive charge = Q = 7.00 times 10-6 C uniformly distributed along one-quarter of its circumference and a negative charge of -6Q uniformly distributed along the rest of the circumference (see the figure). (At infinity V is zero). What is the electric potential at the center C of the circle? What is the electric potential at point P, which is on the central axis of the circle at a distance z = 0.416 m from the center?Explanation / Answer
V = kzQ/(z2+R2)3/2
V = 9e9*0.416*((-6+1)*7e-6)/(0.416*0.416+0.8^2)3/2
V = -1.78741e5 V
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