Most electrical power generation (except for solar) converts motion into electricity using a generator. the two required components for a generator are a) a turbine and a source of electrons to move. b) an armature free to spin and a permanent field magnet, c) a coil of wire and a magnet in relative motion to induce an electric current. d) two coils of wire connected by an iron core to create changing electric fields.

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

The ability to make things happen is also called a. heat b. force c. matter d. energy