In a pulley setup that has a moving pulley,
a. you have to pull the string a greater distance, and it takes more work to lift the mass
b. your work doubles because the pulley moves
c. you have to pull the string a greater distance, but the force needed to lift the mass is cut in half
d. you don't have to pull very much to lift the mass

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply.the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a