2. A 1 J of energy is exerted on a body. Calculate the magnitude and type of electric charge, given that the electric potential is 0.5V. 5 points 3. The potential difference between a certain thundercloud and the ground is 7 MV. Find the energy dissipated when a charge of 50 C is transferred from the clouds to the ground in a lightning stroke. Express your answer in Giga Joules. 5 points 4. Suppose electrons in a TV tube are accelerated through a potential difference of 2x10* V from the heated cathode (negative electrode), where they are produced, toward the screen, which also serves as the anode (positive electrode), 25 cm away. What's the magnitude of the electric field if it is assumed constant? 10 points1. Three charges are plotted in a cartesian plane: Qi at (3, -5), Q2 at (0,6), and Q3 at (-5, -1), forming a triangle. The magnitudes of three charges are -5nC, 8nC, and 7.53nC respectively. Given the figure and directions of forces below, (a) Find the magnitude of the resultant force between F23 and F31 at charge Q3, and (b) Find the magnitude of the resultant force between F12 and Fa1 at charge Q1. Note: Each unit distance is in mm. Express your answer in Newtons. 35 points Q2 5 4 F23 2 F12 -7 -5 -3 -2 -1 4 -9 -8 Q3 -1 -2 F31 3 -4 Q1