FIGURE 6 1 When the bar magnet is
pushed towards the coil, the pointer in
the galvanometer G deflects 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