1.

Find the capacitance of a capacitor, if it is made up of 120 sheets of paraffined paper 0.1 mm thick, interspaced with aluminium foil sheets of 5 cm xx 3 cm dimensions. In what range of voltages can such a capacitor work?

Answer»

Solution :The aluminium foil SHEETS are connected alternately to FORM a system of capacitors connected in parallel (FIG. 25.3). The number of capacitors is EQUAL to the number of DIELECTRIC layers.
The breakdown voltage is `U_(bn)=E_(m)d`, so the working voltage is chosen to be 1/3 to 1/2 of this


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