Final answer:
The full forms of the expressions are A) μe as Electric Mobility and B) E = (I / nA)Q as Current Density. These expressions are related to the field of Physics, often discussed in detail in High School Grade 11 courses.
Step-by-step explanation:
The full form of the expressions given are as follows:
- A) μe refers to Electric Mobility, which describes how quickly an electron can move through a conductor or semiconductor when subjected to an electric field.
- B) E = (I / nA)Q is an expression for Current Density. Current Density is the amount of electric current flowing per unit cross-sectional area of material. It is derived from the formula where I is the electric current, n is the number of charge carriers per unit volume, A is the cross-sectional area, and Q is the charge of the carriers.
The subject of these concepts and expressions generally falls into the Physics category and is covered in more detail typically in Grade 11 Physics.