A capacitor is composed of 2 plates separated by a sheet of insulating material 3mm thick and of relative permittivity 4. The distance between the plates is increased to allow the insertion of a second sheet of 5mm thick and of relative permittivity &,. If the equivalent capacitance is one third of the original capacitance, find the value of &.

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Chapter1: Units, Trigonometry. And Vectors
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A capacitor is composed of 2 plates separated by a sheet of insulating material 3mm thick
and of relative permittivity 4. The distance between the plates is increased to allow the
insertion of a second sheet of 5mm thick and of relative permittivity &,. If the equivalent
capacitance is one third of the original capacitance, find the value of Er.
Transcribed Image Text:A capacitor is composed of 2 plates separated by a sheet of insulating material 3mm thick and of relative permittivity 4. The distance between the plates is increased to allow the insertion of a second sheet of 5mm thick and of relative permittivity &,. If the equivalent capacitance is one third of the original capacitance, find the value of Er.
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