FM18 P42 Q7 Charge Mechanics in Electric Field | Feb/March 2018 | Cambridge A Level 9702 Physics

9702/42/F/M/18: (a) State what is meant by electric potential at a point. (b) The centres of two charged metal spheres A and B are separated by a distance of 44.0 cm, as shown in Fig. 7.1. A moveable point P lies on the line joining the centres of the two spheres. Point P is a distance x from the centre of sphere A. The variation with distance x of the electric potential V at point P is shown in Fig. 7.2. (i) Use Fig. 7.2 to state and explain whether the two spheres have charges of the same, or opposite, sign. (ii) A positively-charged particle is at rest on the surface of sphere A. The particle moves freely from the surface of sphere A to the surface of sphere B. 1. Describe qualitatively the variation, if any, with distance x of the speed of the particle as it moves from x = 12 cm to x = 25 cm, passes through x = 26 cm, moves from x=27cm to x = 31 cm, and reaches x = 32cm. 2. The particle has charge 3.2 × 10–19 C and mass 6.6 × 10–27 kg. Calculate the maximum speed of t. #9702m18p42 #A2multiChargeP4 Instagram Pocket Guide (  / etphysics  ) More Resources (https://9702-physics.blogspot.com/) Tuition/Tutoring inquiries: https://linktr.ee/etphysics Email: [email protected] #CambridgeALevelPhysics