Question: A cylindrical capacitor is filled with two cylindrical layers of dielectric with permittivities l and 2. The inside radii of the layers are equal to

A cylindrical capacitor is filled with two cylindrical layers of dielectric with permittivities εl and ε2. The inside radii of the layers are equal to R1 and R2 >R1. The maximum permissible values of electric field strength are equal to Elm and Ezra for these dielectrics. At what relationship between e, R, and Em will the voltage increase result in the field strength reaching the breakdown value for both dielectrics simultaneously?

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