Which describes michael faraday’s work with electricity and magnetism? a. he discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current. b. he discovered electromagnetism after seeing a compass needle deflected by a flowing electric current. c. he discovered electromagnetic induction after seeing a changing magnetic field generate an electric current. d. he discovered electromagnetism after seeing a changing magnetic field generate an electric current.

Explanation :

Michael Faraday is known for the discovery of electromagnetic induction. According to Faraday's law, the changing magnetic flux produces an EMF which is given by :

is the emf produced.

is the magnetic flux.

We know that emf is

So, the correct option is (C) " He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current" .

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)