Question

A charge --820 nC is uniformly distributed on a ring of 2.4 m radius. A point charge - +530 nC is fixed at the center of the ring. Points A and B are located on the acis of the ring as shown in the figure. a) What is the electric potential at A and B due to the point charge and ring? b) What is change in electrical potential energy when an electron is moved from B to AP Increase or decrease? (= 1.60 x 10-19 C, x= 1/4 mp3 8.99 109 N-m2/C2 4 m A B 1.8 m 1.4 m =530 C Q = .820 nc

Answer 1

correction** potential energy will be 8720.80×10^-20J ans.

on its Electric potential due to uniformly charged ring axis is given by ATTE, VR + 2 Where R Radius of ring V 2 Distance blw centre and other polut on axis 294 1.8m A 1.4 B f Electic potential at A sinyt Potential due to Potential due to point charge q 446 ZA V 1 + ATTE. V R² + 27 9x109 820x109 + 530x10 9 ✓ (2.4) + (1.8)? 1.8 190v And. "A Electic potential at B Potential due to sing & Potential due to poing Chary Ve B ATTE JR+Z t a 2, ZB= 1.8+ 1.4 4tto 3.2m Р 9x109 820x10 9 530810 + 1039) . (2.4) + (3.2) 3.2 Vo = - 354.37 V ds. be DV = VA VB Potential difference bw A & B I 190 - (-354.37) 544.37 1.602x10 - 19 x 544.37 8720.80 I was. Potential energy increases as its from Potential energy mone B to A.

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