The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Faraday as a Discoverer by John Tyndall:|
made contact with the battery; that the needle would afterwards
return to its former position and remain quietly there unaffected by
the flowing current. At the moment, however, when the circuit was
interrupted the needle again moved, and in a direction opposed to
that observed on the completion of the circuit.
This result, and others of a similar kind, led him to the conclusion
'that the battery current through the one wire did in reality induce
a similar current through the other; but that it continued for an
instant only, and partook more of the nature of the electric wave
from a common Leyden jar than of the current from a voltaic battery.'
The momentary currents thus generated were called induced currents,