Final answer:
The provided information does not allow for a conclusive answer to the value of 'a' due to a lack of clear mathematical or logical context and relevance to the information given.
Step-by-step explanation:
To find the value of a, we need to clarify what a, b, and c represent, as the provided information is incomplete and does not furnish a mathematical or logical framework to directly answer the question. However, given the context clues from the references provided - particularly the focus on spelling conventions in English and the principles of electricity in physics - it appears we are dealing with two separate subjects, neither of which helps in determining the value of a. The information provided about spelling and electricity does not relate to the symbols a, b, and c.
The question may have originated from an algebraic or set theory context, where we could define a, b, and c in terms of elements and subsets. Unfortunately, the information provided is insufficient to confidently provide an answer. If there is additional, relevant mathematical context, please provide it so that we can assist you accurately.