Capacitors tend to be more expensive as their capacitance and maximum voltage V max increase. The voltage
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Capacitors tend to be more expensive as their capacitance and maximum voltage Vmax increase. The voltage Vmax is limited by the field strength at which the dielectric breaks down, EBD. Which of these dielectrics will give the largest CVmax product for equal plate areas?
(a) Air: ∈r = 1, EBD = 3 MV/m.
(b) Barium titanate: ∈r = 1200, EBD = 3 MV/m.
(c) Silicon dioxide: ∈r = 3.78, EBD = 16 MV/m.
(d) Polyethylene: ∈r = 2.26, EBD = 4.7 MV/m.
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