le others : 14 1 . Calculate the force acting on a charge of 37 protons sitting in an electric field of 15 N/C? K: 2 2. Looking at the diagram below, in which part of the orbit does the planet have maximum kinetic energy? Why? K: 2 . A .Sun C D 3. Calculate the speed of a satellite in a circular orbit 600km above the surface of earth and also calculate the orbital period of satellite? K: 3 4. Two small spheres, having positive charges of X units and Y units respectively, are located 5 m apart. A test charge of +1 unit is located between them 1 m from X and 4 m from Y. The net electrical force on the test charge is zero. What is X:Y ratio? K: 2 a) 16:1 b) 4:1 c) 1:4 d) 1:16 e) 1:1