Answer Happy

1 Describe the shape of the object to which the distance from a point, a line and a plate of charge is going to be same and describe briefly about why it is important for us to calculate the size of the electric field. 2 Derive the size of the electric field due to the presence of a point charge using Gauss law. You may express everything as variables in your derivation and then do the same for a line of charge. 3 You have a 10 Coulombs of electric charge and that with a same size of the electric charge, but with an opposite sign and the two charges are positioned nearby the center of a large cube where the two charges being contained. Calculate the size of the electric flux to one side of the cube. 4 You positioned four objects with a same size of charge in a line and they are equally distance from their nearby charges. Calculate how much electric work is needed to realize the state, 5 Calculate the size of b field due to an infinitely long wire in a certain distance, and then the size due to a ring of wire at the center. You may use Ampere's law and Biot and Savart law. 6 A single-turn circular loop of wire with a radius 1 cm lies in a plane perpendicular to magnetic field. The size of the field is reduced from 3 to 2 Tesla in 1 minute. Calculate the induced emf in the loop and the direction of the induced emf.