Final answer:
Ben Franklin's whimsical invention is the Glass armonica, a musical instrument he created, distinct from his scientific achievements like the kite and key experiment and the lightning rod.
Step-by-step explanation:
The whimsical (playful, fun) invention associated with Ben Franklin is c) Glass armonica. While Franklin is well-known for his experiments with electricity, such as the famous kite and key experiment, where he demonstrated a connection between lightning and static electricity, and his invention of the lightning rod, his creation of the glass armonica was more whimsical in nature.
The glass armonica was a musical instrument made up of spinning glass disks that could be played with wet fingers, producing a hauntingly beautiful sound.
This invention is less well-known compared to his scientific achievements, but it exemplifies Franklin's creativity and playful spirit away from the serious scientific work he is most recognized for.
Benjamin Franklin's whimsical invention associated with him is the kite and key experiment. In this experiment, Franklin flew a kite with a key attached to it during a thunderstorm to demonstrate a connection between lightning and static electricity.
The sparks drawn from the key hung on the kite string were similar to those produced by static electricity. This experiment helped Franklin understand the nature of electricity, and it is now considered a significant contribution to the field.