WleyPLUS wileyPLUS: HyWileyPLUs I Help I Contact Us I Log Out Halliday, Fundamen

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WleyPLUS wileyPLUS: HyWileyPLUs I Help I Contact Us I Log Out Halliday, Fundamentals of Physics, 10e GENERAL ANALYTICAL PHYSICS (PHYS 211 & 212) Assignment Gradebook ORION Downloadable eT nment FuLL SCREEN PRINTER vtRSION BACK Chapter 24, Problem 025 A plastic rod has been bent into a circle of radius R- 9.12 cm. It has a charge Q1 +8.87 pC uniformly distributed along one- quarter of its circumference and a charge 60, uniformly distributed along the rest of the circumference (see the figure). what is the electric potential (a) at the center C of the circle and (b) at point P, which is on the central axis of the cirde at distance D-5.04 cm from the center? (a) Number (b) Number Question Attempts: 0 of 7 used SAVE FOR LATER Prec ir 1 2000201 IncA Rights Reserved A Division of Sens. Inc MacBook Air 2 3 4

Explanation / Answer

The electric potenital at the center is given as

V = (k q1 /R ) + (k q2 / R)

= (k q1 /R ) + (k q2 / R)

= - 5 k q1 /R  

= - 5 (9x10^9 )( 8.87x10^-12) / (0.0912m)

= - 4.334 V

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The potential at a distace D from the center is

V = - 5 k q1 / ?[ R^2 / d^2 ]

= - 5 (9x10^9)(8.87x10^-12) / ?[ 0.0912)^2 + (0.0504)^2 ]

= - 3.83 V

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Do comments in case any doubt..goodluck

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