I need your help for the definition of the fringing electric field? How can be measured?
The fringing electric field is that field existing at the edges of parallel plate capacitor . Where the electric field between the parallel plates of the capacitor will be perpendicular to the plates and originating from the positive one and ending at the negative one. At the edges the field lines they take longer passes from the edge of the positive plate to negative plates.
The fringing field intensity decreases as one gets away from the edges.
To determine the fringing field one can make a set of capacitors whose area is constant while the perimeter is variable. Then one measures the capacitance as a function of the length of the perimeter . By plotting C versus P, one can fit the curve by the relation
C= A C per unit area + P Cper unit perimeter ,
As we see the slope of the straight line will be Cper unit perimeter. This capacitance gives a measure for the stray field. It is the stray capacitance.
Best wishes
The fringing electric field is that field existing at the edges of parallel plate capacitor . Where the electric field between the parallel plates of the capacitor will be perpendicular to the plates and originating from the positive one and ending at the negative one. At the edges the field lines they take longer passes from the edge of the positive plate to negative plates.
The fringing field intensity decreases as one gets away from the edges.
To determine the fringing field one can make a set of capacitors whose area is constant while the perimeter is variable. Then one measures the capacitance as a function of the length of the perimeter . By plotting C versus P, one can fit the curve by the relation
C= A C per unit area + P Cper unit perimeter ,
As we see the slope of the straight line will be Cper unit perimeter. This capacitance gives a measure for the stray field. It is the stray capacitance.
Best wishes
Dear Dr. Zekry:
Thank you very much for the answer which helped me to understand to concept.
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