Who created the first practical steam engine?

A) James Watt
B) Alessandro Volta
C) Andre-Marie Ampere
D) Georg Simon Ohm


Answer: A
Explanation: A) Correct. In 1763, James Watt created the first practical steam engine.
B) Incorrect. In the late 1700s, Alessandro Volta discovered that when moisture comes between two different metals electricity is generated.
C) Incorrect. In the early 1800s, Andre-Marie Ampere experimented with electro-magnetism and discovered a way to measure electrical currents.
D) Incorrect. In the early 1800s, Georg Simon Ohm discovered a law relating to the intensity of an electrical current, electromotive force, and resistance.

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