Secure l wileyplus com/edugen/student/mainfru https://edugen Chapter 24 A plasti

Question

Secure l wileyplus com/edugen/student/mainfru https://edugen Chapter 24 A plastic rod has been bent into a circle of radius R s 59 cm. t has a charoe Q, +5.21 pc uniformly distributed (see the foure te or circumference and a change Qa uniformly distributed along the rest of the arcumference which is on the is the (a) at the center Cof the circle and (b) at point p. contral ax s of the circle at distanoe D 6.59 cm from the center? (a) Number (b) Number click if you would like to show work for this question ocio sboa TOSHIBA

Explanation / Answer

as potential is the scalar quantity and the distance of given points from charges is same, we can take the total charge collectively, net charge on ring, Q = Q1 + Q2 = -5Q1 = -5 x 5.21 pC = -26.05 pC

potential at centre = kQ/R = 9 x 109 x (-26.05 x 10-12)/0.0859 = -2.729336 V

potential at P = kQ/[[sqrt(R2 + D2)] = 9 x 109 x (-26.05 x 10-12)/[[sqrt(0.08592 + 0.06592)] = -2.1655 V

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