Q. Who invented first electric bulb?

A
Humphry Davy
B
Thomas Alva Edison
C
Benjamin Franklin
D
Galileo
Solution:

Thomas Alva Edison invented the first electric bulb in 1879. Edison discovered that a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours.
The first electric light was made in 1800 by Humphry Davy, an English scientist.

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