' 'nit #3 Test Day 1 VerA Gravitational, Electric and Magnetic Fields ED 1 of 4 .......-. I30 1. The dwarf planet Pluto has a radius of 1.15 X 106 m and a mass of 1.2 X 102:2 kg. What is the value of g on the surface of Pluto? [2 marks] 2. If a 1.5 X IO'EC charge exerts a electric force of 1.9 N on a 3.2 X 10-4C charge, how far away are they located? [2 marks] 3. What is the electric field intensityr 0.5 m awayr from a small sphere with a negative charge of 1.6 X 10'8C? [Note: Direction is outward or inward] [2 marks] 4. A negative charge of 2.4 X 105 C experiences an electric force of magnitude 3.2 N, acting to the left. What is the magnitude and direction of the electric field at that point? [2 marks] 5. Two charges q1 = -25C and 93 = 4C are placed 1.2 m apart. A third negative charge q2 is placed a distance L from q1 as shown. If the net electric force on q2 is O N, what is the value of L? [5 marks] 93 42 6. Uranus orbits the Sun (Ms = 1.99 x 1050kg) with a mean radius of 2.87 x 1012 m. In Earth years, how long does it take Uranus to complete one orbit? [4 marks]7. An electron with a velocity of 5.0 x IDEm/s is injected into a parallel plate apparatus through a hole in the positive plate. It moves across the vacuum between the plates slowing down before colliding with the negative plate at 1.0 x 106 m/s. Using the conservation of energy for electric charges, what is the potential difference between the plates? [4 marks] 8. a) Refer to the electrostatic series. A carbon rod is rubbed with silk. Describe the transfer that occurs and the resulting charge that each object has after their interaction. [2 marks] b) What is the difference between charging by friction and charging by contact? [1 mark] acetate glass wool cat fur. human hair calcium. lead silk aluminum cotton paraffin wax ebone polyethylene {plastic} carbon, copper, nickel sulfur platinum. gold weal-l hold on elections increasing tendency to gain electrons strong hold on EIEDIIOHS 9. Determine the magnitude and direction of the magnetic force on a proton moving horizontally to the north at 8.6 X 104 m/s, as it enters a magnetic field of 1.2 T, pointing vertically upward. [2 marks] 10. How much work is done against gravity to fire a BOO-kg GPS satellite 200 km into the air? {rE = 6.38 x 106 m, ME = 5.98 x 1024kg) [4 marks]