MJ15 P42 Q5 Two Charge Resultant Potential Graph | May/June 2015 | Cambridge A Level 9702 Physics

9702/42/M/J/15: (a) Define electric potential at a point. #9702s15p42 #A2multiChargeP4 #A2ResultantPotentialP4 #Lv3 (b) Two positively charged metal spheres A and B are situated in a vacuum, as shown in Fig. 5.1. A point P lies on the line joining the centres of the two spheres and is a distance x from the surface of sphere A. The variation with x of the electric potential V due to the two charged spheres is shown in Fig. 5.2. (i) State how the magnitude of the electric field strength at any point P may be determined from the graph of Fig. 5.2. (ii) Without any calculation, describe the force acting on a positively charged particle placed at point P for values of x from x = 0 to x = 10 cm. (c) The positively charged particle in (b)(ii) has charge q and mass m given by the expression. Initially, the particle is at rest on the surface of sphere A where x = 0. It then moves freely along the line joining the centres of the spheres until it reaches the surface of sphere B. (i) On Fig. 5.2, mark with the letter M the point where the charged particle has its maximum speed. (ii) 1. Use Fig. 5.2 to determine the potential difference between the spheres. 2. Use your answer in (ii) part 1 to calculate the speed of the particle as it reaches the surface of sphere B. Explain your working. #A2ElectricFields Playlist    • Ch18 Electric Fields | CAIE 9702 A2 Physics   Instagram Pocket Guide (  / etphysics  ) More Resources (https://9702-physics.blogspot.com/) Support us! (  / etphysics  ) Tuition/Tutoring inquiries: Email: [email protected] Whatsapp: https://wa.me/60126679171 #CambridgeALevelPhysics 9702_s15_qp42