He merely used a kite to determine
that lightning consists of ELECTRICITY.
The Big Bang Theory Season 3, Episode 6
(ELECTRICITY CRACKLING)
Westworld Season 3, Episode 8
Going out to discover ELECTRICITY?
The Big Bang Theory Season 3, Episode 6
Same reason
it's got ELECTRICITY:
The Big Bang Theory Season 12, Episode 7
...and told everybody he was gonna provide
ELECTRICITY for the town.
The Big Bang Theory Season 1, Episode 4