(a) Calculate the magnitude of the gravitational force on an electron by a proton that is separated by 1.0m.
(b) How far apart would they have to be for the electrostatic force between them to equal your answer to part (a)?
(a) Calculate the electric field (magnitude and direction) at a distance of 30cm from a point charge q1 = 5 e^9C.
(b) Calculate the force on a charge q2 = 4e^9C placed 30cm from q1.
(c) Calculate the force on a charge q3 = -4e^9C placed 30cm from q1 (in the absence of q2).
Sketch the electric field of the collection of charges described in #2. Briefly, justify your sketch above, below, left, right, and between the charges.
Two charged metal parallel of dimensions l = 1.5m and w = 0.5m plates are 15cm apart. The electric field between them is E = 3000N/C.
(a) What is the surface charge density on each plate?
(b) An electron is released from rest from the middle of the negative plate. How long will it take for the electron to reach the positive plate?