-12 . (Question 5 continued) 1 0 * 10 A proton is placed at A and released from rest. The magnitude of the work done by the electric field in moving the proton from A to B is 1.7 x 10""J. Point A is at a distance of 5.0 x 10 2m from the centre of the sphere. Point B is at a distance of 1.0 x 10 m from the centre of the sphere. (i) Calculate the electric potential difference between points A and B. E a 1 7 x 1016 . . . . . . . . . . . . . . .. . . . . .. . . . . . .;......... . . . . . ........ X 10 3 ... .. ?. . . !........ x10 V 1. 60 X 10-19 . . . . . . .... E ) Determine the charge Q of the sphere. SO x 10 . . . . . . . . . . . . . . . . . ' ' va . ...................... q s Ir d l i bo i "" .... rd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23. . . . . . . . . . . ( 6 , s a. 2\\ " . ). " . . . . . . . .. . .. . ( 1 1 X 10 ) ( 1 5x 10 . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . .. 4 ( 8 94 x 70 ? ) 51 1: 2 . 7 x 10 d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists developed a common terminology to describe different types of fields. E this IS because . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. OF differing . . . . . . . . . . . . . . . J. .. .. . .. . . .. fields are similar gravitation and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ;; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fields are both invealy proportion al to the radios saved