Michael, Scientist Who Wrote on Magnetic Fields
Puzzle 4 of Tricky Spelling Pack
Question is: Michael, Scientist Who Wrote on Magnetic Fields
and the answer is: FARADAY
Word Meaning:
FARADAY — (chemistry, physics) The quantity of electricity required to deposit or liberate 1 gram equivalent weight of a substance during electrolysis; approximately −96,487 coulombs.
Definitions from Wiktionary.