(8c24p23) A circular plastic rod of radius R = 1.20 m has a positive charge = Q
ID: 1901712 • Letter: #
Question
(8c24p23) A circular plastic rod of radius R = 1.20 m has a positive charge = Q = 3.00?10-6 C uniformly distributed along one-quarter of its circumference and a negative charge of -4Q 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 = 0.792 m from the center?
(8c24p23) A circular plastic rod of radius R = 1.20 m has a positive charge = Q = 3.00?10-6 C uniformly distributed along one-quarter of its circumference and a negative charge of -4Q 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 = 0.792 m from the center?Explanation / Answer
V = kzQ/(z2+R2)3/2
V = 9e9*0.792*((-4+1)*3e-6)/(0.792*0.792+1.20*1.20)3/2
V = -2.16e4 V
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