Josheph Henry [1797 –
1878] American experimental
physicist, 
professor 
at
Princeton University and first
director of the Smithsonian
Institution He made important
improvements in electro-
magnets by winding coils of
insulated wire around iron
pole pieces and  invented an
electromagnetic motor and a
new, efficient telegraph He
discoverd self-induction and
investigated how currents in
one circuit induce currents in
another JOSEPH HENRY (1797 – 1878)
Rationalised 2023-24
Physics
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moved towards the coil C1, the galvanometer shows a
deflection