answer all, no need to show work, just answer

SPH4U - Gravity, Electricity and Magnetism Test Name: Date: _May 2022 8. An oil-drop is "floating" in between a parallel plate capacitor separated by 50 cm with an electric potential of 500 V on the top and OV on the bottom plate. What is the number of excess or deficit of electrons in the oil-drop if it has a mass of 10g? a. deficit 1.22 x 1015 electrons b. excess 1.22 x 1015 electrons c. deficit 6.1 1 x 1014 electrons d. excess 6.11 x 1014 electrons ++++++++++ 9. Consider the parallel plate capacitor on the left. If the electron is starts at rest at the bottom of the plate, and the magnetic field strength is 300 V/m, what is the speed of the electron at the other end of the plate? a. 1.0 x 10' m/s b. 1.0 x 1014 m/s c. 5.7 x 10'm/s d. 2.4 x 104 m/s 10. The direction of acceleration for a particle travelling through a uniform magnetic field is dependent on/equal to: a) the associated direction of velocity b) the direction of the magnetic force vector acting on the particle c) the mass of the particle (Newton's Second Law) d) the charge on the particle (positive vs negative - proton vs electron vs positron, etc) 1 1. Suppose a +10 nC charge is located at x = 0m, and a -8 nC charge is located at x = 0.15m. A what point on this line is the potential difference OV? a. 4.2 cm b. 8.3 cm c. 2.1 cm d. 6.1 cm 12. Three charges of +9 nC are in the form of an equilateral triangle with length Icm. What is the electric field at the centr 1.0 cm of the triangle? (Hint: visualize a field diagram...) a. 4.5 N/C b. 7.8 N/C c. O N/C d. 15.5 N/C + 1.0 em woll cloning