Final answer:
All the options listed—Joule (J), Newton meter (Nm), and electron Volt (eV)—are legitimate units of energy. Thus, none of the provided options is an incorrect unit of energy.
Step-by-step explanation:
The question asks to identify which among the provided options is not a unit of energy. The options are: (a) Joule (J), (b) Newton meter (Nm), (c) electron Volt (eV), (d) These are all energy units. Each of these options represents a unit used to measure energy. The Joule (J) is the standard SI unit of energy, defined as the amount of work done when a force of one newton displaces an object by one meter. The Newton meter (Nm) is equivalent to a Joule since it describes the same scenario of a one newton force acting over a distance of one meter. The electron Volt (eV) is another energy unit, commonly used in submicroscopic processes, particularly in the realm of modern physics. Therefore, none of the listed options is incorrect as they are all units used to quantify energy. Hence, the answer is (d) These are all energy units.