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Mathematical relationship between the induced e.m.f and the network
Faraday noted that the e.m.f induced in a loop is proportional to the rate of change of magnetic flux by it:
Where; e is the electromotive force induced (in volts)
N is the number of turns of the coil
dΦ is the change of flux in Weber, Wb
dt is the time taken for the flux to change in seconds.
*Notice the negative sign is the induced current will now form an induced magnetic field. The direction of that magnetic field will be conflicting to the direction the flux is changing.
Astigmation control: In most modern oscilloscopes there is an additional focusing control marked Astigmation . This is used to correct an effect which exactly is analogous to
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