2 When a metal plate is givena positive charge, which of the following is taking place a) Protons (positive charges) are transferred to the plate from another object. b) Electrons (negative charges) are transferred from the plate to another object.

A ball with a charge of 80μC is fixed to a post on a table. A cart also has a charged ball ontop, which has 40μC. The cart is given an initial push toward the post and it starts with 20J ofkinetic energy when it is 1m from the post. Determine how close the cart comes to the post.Include the relevant bar chart.

How to solve this question

In an electron microscope, there is an electron gun that contains two charged metallic plates 3.15 cm apart, An electric force accelerates each electron in the beam from rest to 9.40% of the speed of light over this distance. (Ignore the effects of relativity in your calculations.) (à) Determine the kinetic energy of the electron as it leaves the electron gun. Electrons carry this energy to a phosphorescent viewing screen where the microscope's image is formed, making it glow. (b) For an electron passing between the plates in the electron gun, determine the magnitude of the constant electric force acting on the electron. N (c) Determine the acceleration of the electron. m/s2 (d) Determine the time interval the electron spends between the plates.