What happens when Victor sees an oak tree destroyed by lightning and hears an explanation? What does Victor then begin to study?

Before Victor invented Frankenstain, he was intresented in natural science. After he say the lightning distroy that three and hear the explanation of his relative on the use of electricity in medicine, he got intrested on it.

In the field of medicine, the treatment that uses the impulses of electricity is called galvanism. Victor got intrested in galvanism.

Explanation:

Victor learned how elctric impulses can act on muscles, and galvanism works with electric current on dissected animals. Frankenstain was the result of the expriments over death animals, and electric current.

Frankenstain later on came to life in one night of lightning, along with other electric machines invented by Victor.