2. Determine the magnitude of the net electric field at point P in the diagram below. 4.0 em sssssssssntssncsncacasnnly 3. A negative charged +2.0 x 10*C b P particle that has a mass of 2.8 x 10-16 kg accelerates upwards at 2.8 m/s? in the : electric field between two horizontal plates that have a I 0.15 m separation of 0.15 m. The potential difference across the plates is 4.2 x 102 V. Taking into consideration the force of gravity, find - == === == a) The magnitude and direction of the electric force on the particle. b) The magnitude of the particle's charge