2. Determine the magnitude and direction of the electric field at point Z below, 4K due to the charges at points X and Y. 2C Z 4.0 cm +2.0 x 10 8 C +2.0 x 10-8 C O Y 3.0 cm-3.0 cm- 3. A small hole in a positive plate allows some electrons to escape at a large velocity. The magnitude of the potential difference between two plates is 4K 1.2 x 10 V and the distance between the plates is 0.12 m. If the electron is 2C released from rest at the negative plate, at what speed will it pass through the hole in the positive plate? + + + + + SPH4U Page 2 Page 3 of 5