The small magnetic field caused by the current in each coil add together to make a stronger overall magnetic field. Figure caption, A solenoid, shown here in cross section, has a stronger ...
To demonstrate the heating effect of a magnetic field, Tyndall revolved between the poles of an electro-magnet a copper-pipe filled with an easy melting fuse: the heat disengaged in it by eddy ...
The small magnetic field caused by the current in each coil add together to make a stronger overall magnetic field. Figure caption, A solenoid, shown here in cross section, has a stronger ...
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