The change in magnetic flux induces
emf in coil C1 It was this induced emf which caused electric
current to flow in coil C1 and through the galvanometer A
plausible explanation for the observations of Experiment 6 3 is
as follows: When the tapping key K is pressed, the current in
coil C2 (and the resulting magnetic field) rises from zero to a
maximum value in a short time