Question: Capacitors tend to be more expensive as their capacitance and maximum voltage V max increase. The voltage V max is limited by the field strength

Capacitors tend to be more expensive as their capacitance and maximum voltage V_max increase. The voltage V_max is limited by the field strength at which the dielectric breaks down, E_BD. Which of these dielectrics will give the largest CV_max product for equal plate areas?

(a) Air: ∈_r = 1, E_BD = 3 MV/m.

(b) Barium titanate: ∈_r = 1200, EBD = 3 MV/m.

(d) Polyethylene: ∈_r = 2.26, EBD = 4.7 MV/m.

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