. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. _^ Amp ' •"in Cjn _l Figure wise the equivalent circuit degenerates to Figure , we have a high-pass filter, and interference proceeds as before. Magnetic fields—According to the laws of electromagnetic induction a steady magnetic field cannot cause interference but a fluctuating one can. Amp'. Figure and in practice such fields are set up by alternating currents flowing through devices possessing solenoidal windings such as transformers, heaters, and electric motors, and
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. _^ Amp ' •"in Cjn _l Figure wise the equivalent circuit degenerates to Figure , we have a high-pass filter, and interference proceeds as before. Magnetic fields—According to the laws of electromagnetic induction a steady magnetic field cannot cause interference but a fluctuating one can. Amp'. Figure and in practice such fields are set up by alternating currents flowing through devices possessing solenoidal windings such as transformers, heaters, and electric motors, and to a lesser extent by apparatus possessing what is virtually a single turn winding, notably electric fight bulbs. The magnetic field so produced threads the single turn made by the input circuit of the amplifier, Figure , inducing into it. The magnitude of this , 657. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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