Quiz "Electric Field" 1. What is the magnitude and direction of the electric field 2.0 m directly above a very small ball with a charge of 3.0x10-3 C? (2K) 2. What is the magnitude of the electric force between an iron nucleus and its innermost electron if the distance between them is 1.0x10-12 m? The nucleus charge is +26e. (2K) 3. A charge +Q is placed on the x-axis at x = -1 m and a charge -2Q is placed at x = 1 m. At what position on the x-axis will a test charge q experience zero net force? (3T) 4. An electron is placed within an electric field between two parallel horizontal plates that are charged with a potential difference of 40.0 V. The magnitude of the electric force on the electron is 2.00*10" N. What is the magnitude of the electric field between the charged plates? (2A) 5. If 60.0 J of work is required to move 5.0 C of charge between two points in an electric field, what is the potential difference between these points? (3A) 6. In AABC, BC=20 cm, AB=AC=30 cm. Two equal charges, 1 nC each, are placed at vertices B and C. Determine the electric field and the electric potential at point A. (6A) 7. An electron with a speed of 5.0x10 m/s [forward] enters a uniform electric field parallel to the velocity of the electron. The electric field is 1.0x103 N/C [forward]. a. What distance will the electron travel before it comes to a stop? b. How long does it take to come to a stop? (5T)