This video demonstrates how to construct a working model of Alexander Graham Bell’s first telephone. The author has used wood, copper, spring etc. to construct this. Let us see how it works.
Courtesy: ScienceOnline
This video demonstrates how to construct a working model of Alexander Graham Bell’s first telephone. The author has used wood, copper, spring etc. to construct this. Let us see how it works.
Courtesy: ScienceOnline
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