The faraday disk was an early example of what?

a. motor
b. generator
c. transformer
d. magnet

The correct answer is option B, Generator

Explanation:

The working mechanism of Faraday’s disk is very similar to that of a generator. In this disk, a copper disk is rotated between two magnets  in such a way that it produces electric current . Its functioning is based on the concept of electromagnetic induction. It was one of the earliest form of generator commonly known as homopolar generator

50 inches should be the resultant vector

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.