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Question 11 A plastic rod has been bent into a circle of radius R-9.00 cm. It has a charge Q1-+6.23 pC uniformly distributed along one-quarter of its circumference and a charge Q2 - -6Q1 uniformly distributed along the rest of the circumference (see the figure). With V 0 at infinity, 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 circle at distance D 4.63 cm from the center? Q: (a) Number Units b) Number Units

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Answer #1

Electric potential at any point is equal to the work done per unit positive charge in carrying it from infinity to that point in the electric field .

For both a) and b) we add electric potential due to Q1 and Q2. Elcebie botenhal at any poit Canryǐ.nd itー.frmw ^.nfinity to that Am the ero, tecte potenhal alne to chargea at electnie greld Ta inz potential at infnety euaf to re potential olnu to Chane 3뜁 a he (Ander ysta 웃1_ ,R.= Radiu/) ơf.te einde. fatential clne to aharge at The ytte,一て- : Net veutant potential ot the Center of VTR -12 Volt 9X10万 -. γ=-3,115 VolfRAD2 So, The Charjesaunal are in the same is tanee amee Net Resultant botential at P I-662 - 12 2) 2 2 ーー2-769015246 Volt 2-77 Volt

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